Family isn't supposed to be anything. You are a member of your family by circumstances not of your making. No one chooses their relatives and quite frankly, most people wouldn't associate with theirs if societal pressures or a sense of obligation didn't compel them to. Very few people tell their families to take a flying leap and quite frankly, if merited, it's the healthiest thing a person can do, IMO. My family contains very few people related to me by blood and I'm very happy with it.
Eleanor Roosevelt once said, "No one can make you feel inferior without your consent." If I were you, I'd set about divorcing your emotions from those less worthy family members and don't let them take up any more of your brain than absolutely necessary.