Well you're right. In my own situation It's easy to predict a lot of what many people perceive of me. It's been like this since I was a child and just like you, extended family members are the worst. 
However, I can't control whatever they think of me, and I don't mind. I'm striving harder to be better, I can't say much of these people. At least from what I know, I don't see them improve in the way they do their criticism, they've been the same way.
I can only do what I can. Life makes it hard, but sometimes some people just can't control what others think of them. I've given up telling people that I'm not what they think I am. My path in life is different now and I'll do the best I can. 

Thank you, I'm doing my best for myself