Any psychology experts care to help?

I'm a young aspiring comedian, who struggles with being a manic depressive with serious social anxiety problems. My depression and my social anxiety stem from my own history with other people, "once burned, twice shy" as it was, and believe me I've been burned plenty. Because of this I'm sort of a misanthrope, not because I hate people, but because I am disgusted by the many horrible flaws of human nature. On top of that once you start getting the big picture of how society is, how we act and treat one another it's horrific, I feel like I'm locked in a madhouse. This quote best explains how this links to my image as a happy clown. "Man goes to doctor. Says he’s depressed. Says life is harsh and cruel. Says he feels all alone in a threatening world. Doctor says, “Treatment is simple. The great clown Pagliacci is in town tonight. Go see him. That should pick you up.” Man bursts into tears. Says, “But doctor… I am Pagliacci.” What should I do, therapy didn't work before?