Put it this way...You wont be there forever. It is free to learn. Why not grab the opputunity? (I also hated school so much! The scum that were in it...). You may aswell take what you can from it...See it as like a job? If you ruin it and get kicked out, you will be far behind the averages...
On the other hand, if you wanna get kicked out, go for it. You'll only be wasting their time if your being disruptive...(Also, whatevers happening, they don't know...So speak to them if anythings bothering you)...
Sometimes I wish I could go to prehistoric times, or about that time in a similar setting. I would not need to go to school, I could prepare something for my dear family to eat, walk in meadows of flowers and forests of trees and visit friends.
But, of course, that would mean giving up science or modern technology that is not available at that time. Information about the cosmos or physics. Cells and anatomy ignored.
Maybe I am just lazy. I wish I was not forced to be born in the system.