Anger can be positive. Anger against injustice is good. Anger at a dirty house can motivate some people to do some cleaning. It’s okay to get angry when your team is losing a game. There are roles for anger, in moderation and under control.
I don’t get angry anymore. I used to get really angry about things like bullies. For the first six years after I developed schizophrenia I was angry all the time. For some reason it just went away maybe because of the injection I take.
Being able to use anger constructively is a skill worth having. Anger can as necessary emotion can help you become aware of possible injustice you or someone else experienced. It can act as fuel for proactive behavior.