I'm mad at me

Anger.... it's an interesting thing. From what I understand it is a secondary emotion. That means we are usually feeling something totally different than anger but use that emotion to protect ourselves from revealing the true vulnerable emotions we are feeling. We may not even be aware that we are feeling hurt if anger is our go-to place. We just get "mad" and "go off".
As it relates to anger, I realized recently that I was angry about certain things but never expressed that. I rarely if ever showed it to others because I was not comfortable with anger being an emotion for me at all. This is probably because I know so many people who use it to control others. Loud volume and harsh words are not my thing at all. In fact I can't stand it when someone is yelling and screaming in your face. What are you really supposed to do with that?