Comment by zackattack

Is it possible that you actually can't really do those things if your startup failed? In other words, is it possible you're representing having skills that you don't actually have? (It reads to me as if you have a willingness to practice those skills, though they aren't well developed.) Maybe it's time to honestly evaluate where you're at and invest some time into personal growth and development. You will reduce cognitive dissonance and through surrender to the mastery process some of your depression will be ameliorated.