I'm so frustrated that I've disowned both of my parents.
That seems really serious, why did you disown both of your parents?
They are so critical of me and it makes me feel bad all the time. I can't deal with them anymore.
It may not feel good when they criticize you, but they're most likely doing it out of a place of love. It's good to care about your family and disowning them will only make you feel lonely the older that you get. You should always try your hardest to keep those closest to you in your life.
I don't think they'll ever change and I'm tired of dealing with them.
I know you're frustrated but tell them how you feel about their comments. Help them to understand that their words are hurtful and you can't be around their negativity. Ask them to think about how they would feel if they were being criticized so much.