Brussel sprouts, boiled is fine. I have them every day.

Green olives. I guess some people don’t like them.

I use to not like cranberry sauce, I liked it as I got older, but I don’t eat it anymore, way too much sugar.

I don’t know very well what other people don’t like. I’m surprised by most of the things already listed in the comments, apart from canned fish and liver. I don’t like seafood, except for salmon and crab, so there’s a whole bunch of food other people like that I don’t.