No offense, but your subjective interpretation of your own experience is still a subjective interpretation. Coming to terms with that might help you find a little peace in the ways you feel you were wronged or failed. Accelerated classes are not a golden ticket to success. They are not even a required stepping stone. Whatever greatness you imagine you have should have carried you in other ways.

Maybe you should take some of that blame off your parents by acknowledging that the people tasked with grading you were your teachers.

Maybe your neglectful parents are the only reason you developed any intelligence. Hardship cultivates growth. Those who are successful long term are not the ones to whom things are handed.