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.
Honestly I think the whole “kill the joy of reading” thing is a myth. You for example continued reading in private even when you didn’t like reading in school. That’s a reasonable thing for someone to do if they like reading. No one who’s into movies will stop watching them after seeing a couple bad ones. People who hate reading because of school assignments never had much love to lose.
In any subject teachers should try to make things as fun and engaging as they reasonably can, but not doing so doesn’t excuse being a bad student.