I don't belong in my school

I'm a junior in high school and I've been struggling with social anxiety and depression for my entire high school career. This year it's gotten so much worse. The academics are horrible; the classes are so unorganized and the teachers are always putting us down or trying to force their political opinions on us. I'm a straight A student, I'm in multiple AP classes, and I love to learn, but this is taking away all my enthusiasm and motivation. My grades aren't as stable as they have been in previous years. I don't fit in among the students, either. I'm a quiet person and I've sort of made peace with that, but I can't interact with anyone at all. I'm such an outsider, even in my group of friends and the activities I'm involved in. If I left, no one would be affected. I want to change schools so badly but my parents and therapists want me to learn how to cope and finish out the year before we change anything. But it's going to be so hard and painful. I can't study or do homework because thinking of school in any way hurts. I've tried making things better and they may improve for about a week but things always get worse again. I even cut myself for the first time this year. This school is taking away my will to live and I need to get out. I don't see how keeping me in a place that causes me so much misery is going to help me. I wish I could go someplace new, learn how to cope there, and start over. But I'm being forced to suffer here and I can't take it anymore.