You caught me short there. I was wondering what brand made the “ketchup and blueberry”-flavored yogurt. It seemed an … unexpected … combination. But maybe a fun sort of tangy / tart.
As to purple glop, I assume you (or your long-grown kids) never ever ate Welch’s grape jelly. Nor perhaps the ubiquitous strawberry preserves without which no American child can grow to adulthood?
Grape jelly is a definite NOPE. Strawberry preserves are fine. I know it’s irrational.
As to me …
I was not a fan of beets until fairly recently. Cooked beets are now fine w me.
Pickles (i.e. pickled specialty cultivar cucumbers) are fine, but I prefer the non-sweet to the sweet varieties. But pickled darn near anything else is not food. Most especially pickled beets. Not a happy combo at all.
Mustard and horseradish are almost inedible whereas even fiercely hot capsicum is yummy.
Green Bell peppers have an annoying cloying hint of hot over their fundamentally off-putting flavor. They’re far short of inedible, but I’ll prefer darn near any other source of piquancy in a dish.
I am so burned out on grape and strawberry flavored jams, jellies, preserves and the like that I can avoid them for the rest of my life and not feel like I’ve missed anything.
Which is why I was so disappointed that one time I was in NYC, 20 years ago. It was a Dopefest, and we all had dinner at a restaurant that I think was called The Americana (there’s an Americana listed for NYC on Google, but I don’t remember what the place looked like, and the result doesn’t have a peanut butter sandwich on the menu, so I don’t know if I’m right on the name). In addition to my actual dinner (I had the lamb chops), I noticed a peanut butter and jelly sandwich on the menu. For $7. Now, I’m just a small-town boy from Indiana (currently living in Kentucky), and I just had to know what a $7 PB&J tastes like, so I ordered one to go.
Later that night, when I wanted a snack, I opened it up, and was about to indulge. It was white bread, creamy peanut butter, and grape jelly. I was seriously disappointed.
To the point where it almost ruined the whole trip for me.
ETA: if I make a pb&j sandwich now, it’s cherry, apple, peach, or raspberry for me.
Yikes! Well I guess now you know. 
Never developed a taste for meaty fish, like salmon or trout. Bleah. I also have never taken to beer. (That makes more to share for everyone else at the meal, though!)
At my workplace I’m known as the person who almost gags at the smells of any kind of fruity/floral drinks. I believe it’s like the common reactive dislike of anything coffee-flavored, mentioned by many people here already- just that with me, I can’t stand passion fruit or mango-y fragrances. Also, who wants to put a flower arrangement by an espresso hopper? 
Did you mean the soap course? 
All of my friends (except one) love the stuff. They will pile tons of it on their chalupas* and tacos.
But I manage to be friends with these people anyway.
*In some places, this is called a tostada. Basically a crispy corn tortilla heaped with beans, cheese, sometimes meat, lettuce, tomatoes, jalapenos.
Now I want one. Or three.
I was going to answer “most things” but surprisingly, this picky eater likes many of the things folks have mentioned.
One thing that I refuse to be around is feta cheese. Easy enough to pass on invitations to Greek restaurants but when coworkers have it for lunch, I have to leave the room.
Huh. If asked to name a “meaty” fish, I would say cod, monk-fish, swordfish, halibut, tuna, etc. I would place trout and to a lesser extent salmon at the extreme opposite end of the spectrum.
I now live in the Midwest, so the list is long, but I’ll start with deep-fried cheese curds. I like fried foods, but fat fried in fat is a bit much.
Dippin’ eggs.
I subscribe to the Ron Swanson theory: Fish for sport only, never for meat. Fish meat is practically a vegetable.
Opposite end of the spectrum here. We eat fish a couple meals every week.
Sushi made with seaweed.
I used to keep a tropical aquarium, and would periodically clean the “debris” off the bottom gravel using a siphon. If I sucked on the siphon (to start it) a bit too long I got a mouthful of aquarium water - yuck.
The first time I tried sushi I thought - EGAD, THIS IS JUST LIKE AQUARIUM WATER.
Olives, green or black. Top of my list. Just can’t.
There are more than a few things I don’t care for, but things that disgust me are olives and ketchup.
Both my parents and in-laws find cottage cheese, either alone or with fruit, to be an acceptable snack. I gag thinking about it. I have eaten insects and fish eyes that I would gladly eat again before I tried another spoonful of the stuff.
Years ago my gf had made some delicious, healthy, muffins. They were in the freezer in a bag. I got home from work and craved a muffin. I took one out of the freezer and put it on the kitchen counter to thaw. Every so often I’d walk through the kitchen and check on my thawing muffin.
I figured it was ready to eat. I went to get it and it was gone! II immediately thought of Ella, the only dog at the time with the nerve to take something off of a counter. I ran downstairs (where Ella had a bed and liked to hang out) and saw her, looking guilty as hell, with a huge muffin in her mouth. She dropped the muffin into my hand and walked away.
When my gf came home I told her the story. She got a good laugh out of it. Then she told me she was going to the barn to clean stalls, and would take the muffin down for the chickens. I looked at her, puzzled. I’d eaten it.
To be clear:
Jello pudding = fine and dandy
Jello cheesecake = OK in a pinch
Jello gelatin = snot-ball
My mother makes some Jello dish with lime Jello, cream cheese, chopped pecans and God knows what else and just thinking about it makes me want to… EXCUSE ME! 
But of course! 
When I was a kid I had a friend who liked to eat fruit-at-the-bottom yogurt without mixing it up. He’d just rip it open and start eating it. I’m not sure exactly why, but I always found that disturbing, even just thinking about it 40 years later.