*sigh*
You deserve better than that. I'm only half joking when I suggest you try ignoring your own opinion of yourself. (I'm also taking a meme at face value, which is probably a mistake.)
It's kind of a catch-22, but if you're garbage then so is your opinion. So If you're not garbage but you think you are, you're wrong. And if you are garbage, then no one--including you--should listen to your opinion. Either way it's irrational to think of yourself garbage.
Just don't ask me how to mindf**k yourself out of being irrational. It would be the blind leading the blind on that one.