Yes, I know one such person, an ex-girlfriend of one of my best friends, whom he is still friends with and who I sometimes meet when I’m visiting my friend. She absolutely ignored me from the first time we met and still does. She doesn’t say hello, talk to me or even look at me. I have no idea why, usually I don’t have problems getting to know people, and I’m always polite to new folks. It puzzles me, but by now I don’t care anymore, though I always hate it if she’s present at my friend’s when I’m visiting.
Lol, stupid speak to text.
Sure, I get that at work. There are a couple people that seem to dislike me for no reason I can tell (I’m sure, of course, they do have a reason.) And it’s people I don’t have a lot of intertaction with, so I can’t imagine what I ever did.
Of course, I also get it the other way - there are people at work I rarely inerteract with, and they’ll greet me in the hall by name,“How you doing!”, obviously pleased to see me, and I would swear I have never met them in my life!
I honestly don’t pay any attention to what people think of me. I’m sure I’ve encountered people who hated/disliked me, but I really don’t know about it.
But there was a time when I really disliked a person I’d met, for no apparent reason. It wasn’t anything the guy said or did, he just rubbed me the wrong way. I couldn’t figure out what there was about him that I didn’t like, until I mentioned this to someone else. It turned out that EVERYONE felt the same way about this person, without reason. To this day, nobody likes the guy.
I’ve run into a few people to whom I’ve got some sort of strong physical negative reaction, for no reason that I can consciously place. I just find it unpleasant to be near them.
I do my best not to let them know; except that, if I have no reason to need to be around them, I avoid being around them. But if I do need to be around them, I’m not going to refuse to talk to them, or to do the equivalent of giving them bad grades, or whatever. As you say: a conscious effort not to be a jerk.
– I can have the same reaction sometimes to certain people who seem to have strong positive charisma for a lot of other people; on me whatever they’re doing that has that charismatic effect seems to work backwards. But I’ve had it happen occasionally when that didn’t apply, and the person causing the reaction in me seemed to be a genuinely nice person who’d done nothing to upset me that I could name; and I don’t have it happen with some other people who I dislike for reasons I can consciously explain.
Yes to everything mentioned. I have been disliked/hated on sight by others. I have disliked/hated others on sight! No real reason why, but I will offer this: a combination of resting bitch face and extreme reserve (or shyness) will provoke this reaction. I am extremely quiet and introverted, I have a hard time with small talk, I tend to just stare at some extrovert clown (virtually dancing on a table with a lampshade on his head-I am unamused). Yeah, I come across - or maybe am - a real pill. But I don’t mean any harm, and people have grown to know me and become friendly!
I had a boss once who disliked me, and I can only think it had something to do with my Y-chromosome. Others on my team who were female raved about this person - so collaborative, so supportive, so consultative. But for me none of that - just tossing stuff in my direction and not helping in any way and never making expectations clear, so I was never getting the job done right.
I was unaware we had ever met. 
Actually, there are lots of reasons people take a dislike to me.
There was this kid in my middle/high school that teased me daily in band class. We both played trombone. He was known as the sweetest, nicest guy to everyone else. I would have liked him if he didn’t hate me.
One day he told me he watched a movie called The Beast about a giant tentacled creature. But he said, “It wasn’t that scary” because he had to sit next to me every day. And then, through a persistent campaign, he managed to get everyone in band to call me Beast. That was my name in high school. Even my friends called me that. One even addressed my mother as Mrs. Beast. At a certain point I kind of had to own it.
He teased me nonstop about my skin color, which has always been a rather brilliant white. (“Do not look directly at the white!”) He mocked me when I bent over. (“Bend at the knees!”)
I have no idea what inspired this. I was a fairly successful, confident kid. I didn’t go home crying every day or anything. I guess I found it frustrating? Because there was no reason. He also had a policy of treating me with respect and kindness whenever we had a performance. He’d tell me I looked nice and give me compliments. Then Monday morning he was mean again.
Years later he added me on Facebook and I called him on it. My main question was, “Why?” And he apologized sincerely but couldn’t give me a reason. “I was just a dumb kid.”
Sounds like he had a crush…at least that’s what moms are supposed to say about mean little boys.
I assume you don’t walk around there with a MAGA cap on your head. 
Usually people dislike me for a reason. I tend to speak plainly. Often it’s taken as rudeness. I also have a dry wit, and people often don’t understand my humor.
I have met a person who I instantly disliked. It was a man at my old church. He and his family (wife and 2 or 3 kids) were new. I always felt my hackles raise whenever he was in the room. I could never figure out why, and no one else seemed to feel it. I would usually leave if he was there, as it was really uncomfortable being there. I never did figure out why.
Several years ago, I started a job in a newly formed group within a larger company. There were about 10 of us all hired around the same time and we all seemed to get along fine, so I thought. As the group grew from 10 to 25 people, our manager was moved up to director and I was named manager. I stayed at that job another 10 years and thought everything was great and I was a good manager. I had sensed some hostility but always figured it was jealousy over my promotion.
But 5 years after I left, a friend and co-worker told me I was despised at the organization, even before being promoted. And that 5 of the 25 people had all threatened to quit if I wasn’t fired when my promotion was announced (their bluff was called and only one actually quit). I never did find out why I was so disliked, I never recalled any specific incidents.
So not only was I hated by several people, I was utterly clueless that I was so hated at the time. Looking back, it is obvious I was excluded in any extra-curricular activities the team would do, but not so at the time.
Most people here understand instinctively that an American relocating to Europe has done so for good reason. But not everyone got the memo.
There was a high-ranking 19th century German diplomat who supposedly had an infallible method for creating enmity between colleagues.
He’d say to one, “You know, so-and-so doesn’t like you.”
I wonder if scheming people still do that at work to create trouble and advance their own agendas.
I also been strongly disliked by my peers for no real reason. Whenever something went missing I was always blamed.
I also had a coworker that threatened to literally throw me out the window for no reason.
I’m sure there were people who didn’t like me, but I honestly can’t remember anyone in particular. Mostly, I was popular with everybody. Got along in the work environment and socially. I think I inherited it from my dad, who was one of the most liked people I know. I have no idea how/why it is. It just is.
OTOH, I usually like everybody well enough, but every once in a while, I’d run into somebody that I’d dislike on meeting them. I’d try to ignore the feeling and give them the benefit of the doubt, but they all eventually did or said something that validated that initial dislike.
In the late 80s I worked two years in the office of a medical lab. The second year I was promoted and my new supervisor hated me from day one. I have no idea why. I did a great job so she couldn’t fire me. She was always looking for a reason, though. The best part of the job was that I worked 11:30 a.m. to 8 p.m. so I was only around her five hours a day.
Then one day she told me that I was overqualified for my position and would probably be happier elsewhere. That was the final straw. It was in December so I waited until my Christmas bonus was in the bank, randomly rearranged all my files and left a note on my desk that I quit. And I’m sure she thought that was a great Christmas present. It never made any sense to me.
Silver linings.
There was one guy named Scalzo back in my military days. I stood up for him and saved his rank when he went before the CO, but for some reason he got it in his head that I’d wronged him, possibly egged on by somebody, I’m guessing. Anyway, he would just glare at me, and finally a couple of people told me that he was “out to get me”. Tried to talk to the guy but just got stony silence and more stink-eye. I finally told someone (who warned me again) to tell the guy to put up or shut up, and then cut a two foot length of 3/4" steel pipe, wrapped one end in electrical tape, and slept with it for the rest of the deployment.