I am still remembering what your parents actually said to you. That was verbal/emotional abuse....period....IMHO.
You DO NOT under any circumstances....no matter how codependent your parents are....have to take this abuse.
You have tried to appeal to your parents rationally....that didn't work....you tried to set up boundaries for yourself...those were catagorically ignored.
Boundaries only work on people who recognize those boundaries. People who are capable of being rational. Your parents refuse to acknowlege your boundaries. What will you do when your boundaries are not honored? What are the consequences?