I treat my family terribly
Why do you treat them badly?
I don't know there's just something about them I hate.
That's sad for you and your family. You should get to the bottom of why you feel that way so that you can better the relationship.
You're just being a buzz kill. You don't know my family.
Fair enough, maybe they are not the best people.   If you do not think that it is resolvable you should distance yourself, but acting rudely towards them will only make you more stressed and angry.