I have a huge list as well, although I am no longer in school.
I hated the pointlessness of high school. They always wanted to know your business. Down to having to ask to use the restroom, cell phone bullshit regulations, the fact that they could tell you off and expected you to sit there and take it, the fact that all the adults acted as though they knew better, I was almost punished several times for self-richeous teachers thinking that they knew what they didn't, the pointless homework, the pop quizzes, boring lectures, horrible teachers, the long hours, the starting and ending time, how they are ordered five days a week with only two days off, I can go on and on and on.