I am sorry all these terrible things happened to you.

When I looked up what WWASP is (WWASP Survivors | WWASP History) it says many of the programs have been shut down because of so many survivors of the programs say they endured physical and sexual child abuse as well as various acts of fraud and racketeering. That it is so well known should help your parents see the truth. I hope so. Perhaps you could just tell them that you where abused and still suffering from it but don't go into the specifics since it is so triggering? I don't think you should have to pretend anymore.

Good luck with your move.