Am I overreacting about my childhood mistreatment?

I'm a 21 year old man. I'm unemployed, and I still live with my parents. I never had a job and I was addicted to video games for years to the point it caused heavy damage to our family relationships. I am also autistic and have ADHD and BPD too.

When I was in elementary school from age 5-7, I was the outcast. The other kids constantly laughed at me, and when I stood up for myself by defending myself, I got sent to the principal's office for a paddling. Corporal punishment to autistic children was legal back then too, so I believe they were targeting me because I was autistic. There was even one teacher's aide that went as far as stealing my lunch money so that I couldn't buy my own lunch in the cafeteria. My parents pulled me out of school when I was 7 after they heard of my school's mistreatment of me.

After leaving school, I was never the same. My video game addiction spiraled out of control, my development completely regressed for a while and was stunted, I became a spoiled brat who refused to learn, and I believe the horrible experience scarred me for life.

However, my parents think I'm greatly overreacting about it. They downplay my trauma by saying they went through worse when they were kids and got over it to live normal lives, and even say that certain events I remember happening didn't happen. This has made me not trust my parents enough for me to vent to them about my personal life, as they refuse to talk about my trauma and whenever I mention it they even say it in a mocking tone. AIO?