Literally any book that you now dislike due to school. This also applies to other literature styles as well.
Mine is The Hunger Games. I had to read it las year in school and it drove me insane. We started doing the novel study in early February and didn’t finish until May. I finished the book in less than two weeks, so I was pretty much just reading personal books all through English class for close to two months.
It’s not even like we had to analyze it super intensely. It was projects like ‘Make a playlist for a character of your choice’ and we had vocabulary tests every week, that were a joke. It was multiple choice for words like quest and forage. I know that English wasn’t everyone’s first language but come on.
I didn’t even like the book that much in the first place, so all of this was just adding to the misery.
Most books I didn’t like at school I probably wouldn’t have liked much anyway. I don’t enjoy Dickens and Shakespeare to read even if I like the plot/stories themselves (eg. I like Great Expectations in principle but it’s a slog of a book). The only one I can think of that I might possibly have liked better outside school was Tess of the D’Urbervilles which I loathed in A-Level English Lit but can’t really remember quite why. I’ll never be touching it again though to find out!
I’m quite glad English lit didn’t cover more books that overlapped with my tastes, the overanalysis just ruins everything while you lose focus on the tone and message trying to dissect individual word choices, many of which I expect are largely coincidental