Anger at the world is a necessary step for many people going through this change (definitely was for me), but at a point you begin to realize how immature and useless it is. Being angry at how the world works is a strikingly similar mental strategy the feminists have. They blame their surroundings for their own issues.

female ex. Men are inherently shitty because they will act like they like me for me in order to get in my pants.

male ex. Women are inherently shitty because they'll keep me around leading me on for years on end in order to get validation from me when they're desperate.

At a point, you need to accept both your past and life for what they are and get the fuck over it. If you don't, you're living with a perpetual victim complex that only propels you backwards in life. You need to see past your own ego. You fucked up and have (maybe) been fucking up for years. Admit it to yourself.

When I lift I purposely get in an angry mood. It helps me lift more. The difference between old me and new me is what I get angry about. Old me would get pissed that people didn't like me and use that as fuel. New me gets pissed that I give a shit if people like me. I'm angry with the mistakes I've made, not with the mistakes of the universe.