I was sort of not-liked, but only by a group of friends that my now-husband had through one of his sisters. (Well, and by my father-in-law as well, but that’s another matter.) It was the sister he’s closest to, and the friends were her friends through work. That sister was, while we were in a (committed!) long-distance relationship, trying to set him up with one of her friends, and the gal went as far as pushing a kiss on him when he was really drunk. He pushed her away and told her no, he wasn’t interested, and she finally seemed to accept it. However, I moved to be with him and then we finally got married, and her friends were pretty much civil to varying degrees but definitely not warm. It didn’t help that they were party people and smokers, while I’ve never smoked and act as a designated driver when my husband and I go out. (They would just drink and drive.) I wasn’t preachy but my behavior definitely stuck out. Going to a gathering with them was like walking into Cheers with Norm; they’d all call out my husband’s name. We stopped hanging out with them after my husband got sick of their shallow ways; I was trying to be social and lovely but it never got through.
My sister’s ex-fiance wasn’t liked by our family or her friends. He was a great guy at first, if a bit of a braggart. Still, he was friendly, respectful, handsome, and had all sorts of cool tales and photos of the architecture restoration jobs he’s done (including the main Mormon temple in SLC). Then he soon became determined to become the worst example of a hick. His long, be-ponytailed hair turned greasy and ratty, his nobly giving up cigarette smoking for my sister was replaced by lots of pot smoking (plus frequent stops at dive bars to buy pot off questionable people, including overly-affectionate women), he couldn’t hold down a job any longer, he’d fail drug tests for union jobs and those were for things like painting big walls for stores rather than art restoration, and he even went to Mexico on a “vacation” with his brother (and without my sister) while he was unemployed. I didn’t say a bad word against him, except when he wanted to shoot off illegal and highly dangerous fireworks in a state park when we were camping, and my sister said something as well anyway. If she had asked me I probably would have politely explained that I had lost respect for him, but she didn’t, and I didn’t want to judge from the infrequent times I saw him. A lot of the above about job loss and drugs I found out after the fact. When my sister called my mother to tell her she was leaving him, she tearfully confessed that she thought we’d be disappointed in her. 
It broke my heart to hear that; we never told her anything about “needing” a man or whatever, and the compliments about her man had certainly stopped. (She’s since found and married a guy that we all adore.)