I just BARELY scraped a 'G' grade in the math GCSE (high school exams)
What REALLY infuriates me, is that the (spesh, aspie) school I moved to after my Kanner's school refused to let me take the higher tier science papers, saying oh we just don't do that. Didn't have time to fuck with them over it. I should have done more, I wish I had given them hell on earth over that. As a result the maximum I COULD get was a 'C' grade. I think I deserved an A or even better, since I went on to get, according to some of the staff there, the best science grades the school had ever had. Missed ONE damn question and that was due to stupidly switching the formulas for bicarbonate and carbonates, if I remember right.
But that was at least a source of some inner pride, and satisfaction at, metaphorically speaking, taking their damn insult and shoving that paper right up their arses. Sideways.