How do I get over feeling I am not as good as the rest of my extended family?

My Mom and her family don't get along. She often kept me away from them as a kid though now as an adult I see them. The family doesn't get together as often anymore since the grandparents have died (holidays are no longer held). What I am worried about is that since my mother is not popular then I am not. I am worried my cousins think of me as "okay only" since I wasn't loyal to family as a kid like they were as my mother wouldn't let me go under the mask she was "protecting me from my grandfather's drinking" which was BS as all my cousins went and turned out fine. So how do I get over this?