I feel I can't have a relationship with my parents.
Why don't you want to have a relationship with your parents?
They don't accept me for who I am and it makes me question myself every time I'm with them.
I can understand that your angry with your parents for not accepting you, but you should talk to them and work our your differences. They may not understand how feel and that their behavior is wrong. It's important to work out your differences, repair your relationship and not be angry with them.
I can't do that because they suck.
They may suck but they are people who have their own personalities. Not everything comes easy. Maybe you can help them understand where you are coming from.