Crapola

Don't ever let anybody tell you you're scum. Not even you. That belief system is a big load of steaming crapola. Counter the compulsion to believe it with daily doses of "I love you's" spoken to a mirror. If that's currently impossible, find a photo of yourself as a little kid and say it to that. It doesn't matter if you believe it. What's important is to keep saying it, regardless of the storm of self abuse Insecurity throws at you. "I love you" is Chinese water torture to insecurity. Wear it down.