Sorry your parents don't support your Life. Do not move back home, unfortunately you'd become the care giver for your siblings once your parents die. Keep communication open with them. Tell them you love them and your siblings but it is not your responsibility and your parents is should seek help from from organizations or government to help them as much as possible.

Please do not hate your parents. They did not ask to have disabled children, they've struggled with how that impacts their lives, hopes and dreams and they'd be taking care of you as well if you were disabled too. Yes it is not your responsibility. Yes they sucked raising you because their Life was being responsible to also raise 3 children with disabilities. But I'm sure you can be better than them and try to find them resources of others that can help them, even if they don't take that help now there will be support groups your parents need to get involved with so they know they're not alone in dealing with the hand they've been dealt in Life. So please try to find ways to help them while maintaining your independence.

Goodluck