Welcome felicia. Not all the kids or teens hate school...someone dislike things like tests, but in general they don't dislike school. In depends. Personally, I didn't like school, but for the 'social' part, not for learning. Though sometimes the work was really to much...I disliked also this sometimes, though I like learning...but possibly without so much pressure.
I think that the reasons that the others pointed out can be true.
However, welcome again here