The withdrawal of self love is one of the primary sources for our least desireable behaviors. It's generally much easier to be compassionate to others than yourself, and when you pass judgement on yourself, then punishment follows, and rebellion after that.

Next time you get down on yourself, picture your dearest loved one saying it to you about themselves and think about what you would say in response. The only way to stop the cycle of violence is with love. This applies just as much internally as it does externally.