I just wanted to start off saying I have ADHD and it most certainly is not a illusion. The way you were treated was beyond awful. Did you file a case for bullying at your school. If you did you should maybe try the police, while it may be extreme it seems to fit your situation. I am so sorry that you had to give up your place at that school, however, you shouldn’t give up your career. In the above comment, it mentions how you should look into organizations that specialize in arranging work for those in your situation. This would be a good step for you to take.