I expect too much from others (because I'm willing to give more than others), then I'm disappointed so I lower the bar, then I'm miserable being around normal average people, and repeat.

It's not a matter of inferiority/superiority, it's a matter of not clicking with others. I've tried my whole life to understand them, and to be more flexible in my expectations, but it never ends well. Either I feel resentful of them, explode on them, retreat from them, or give up trying completely until the loneliness gets me out there again. I'd rather just be alone than feel alone in a room full of people.