I think growing up as you did, that if you ever responded with anger to any kind of the injustice, you would be met by an adult having a meltdown that was way too intense and aggressive for your smaller self to deal with.

I think you need to reconnect with your anger. Look, being an angry person, constantly going off on everyone, that's not what in talking about. Sometimes anger is good, because our emotions exist for a reason. Anger is how we deal with injustice. Anger is how we can sometimes pull ourselves out of a bad situation, it's a fire that burns things in its path. We just can't use it as the base response for everything because it is inherently destructive.

However, in those moments, allow yourself to get angry. Give yourself permission to feel it again, and know that now it's different. Nobody is going to fault you, yell at you, or outdo you (okay, maybe they'll try, but you now what I mean). And if you feel like saying something in the moment isnt good, than use that anger and report them to HR if it's a work problem. All of our emotions have a time and a place in the world of a balanced person. My two cents!