I think you're too self-effacing. The problem is certainly not you.
I dropped out of school in 10th grade, and consider it the best decision I ever made. If you are going to do it, it's a decision you want to execute very carefully to avoid major confrontations with the people who still have a lot of power over you and think they're acting in your own good.
You might also consider Sudbury-style schools, where you would be completely free to spend your day however you like (I went to one after dropping out of high school, and now work at one).