Hmm. I used to have anger issues throughout my 20s, and they've gone away. I think a lot of it is frustration with nparents. If you're always wrong, if it's always your fault, if everything you are and do is bad, you might reasonably become frustrated and angry at the first sign of criticism. Because you don't want to be a doormat and let it affect how you see yourself. The worst sort of fleas.
Because, when you get out into the big world, of course you will sometimes be wrong, and it will sometimes be your fault, and the things you do will upset other people. If you've been raised by loving, logical parents, perhaps your first reaction will be to analyze the criticism and correct the issue if possible, apologize if not. And you become a better person in the process. If you've always been wrong, your default response might be anger. Because you've learned that criticism is unjustified.
I try to look at criticism as the opportunity to grow and improve myself. To remove the fleas. But I analyze the criticism first: "How does changing my behavior help the situation?" "Does the person have everyone's best interests at heart." That sort of thing.
Now, when the criticism comes from my nmom or esister, I hardly ever get angry. I still get frustrated, and might say something snarky. But usually I just analyze it, note that it's illogical, and reply, "No, actually, taking a bottle of wine to dinner is certainly appropriate, since you don't know whether or not X is actually an alcoholic and gossip tends to be untrue." (This was a recent visit... we were invited to dinner with friends who make and love wine, and nmom and esis freaked out that it would be inappropriate for no reason. Like I should go to dinner empty handed like they were planning to do? No clue.)
But I didn't get mad, raise my voice, or even snark. I just analyzed, determined that my course of action was acceptable, and told them so in an even voice. It's less effort, and criticism from sources with my best interests at heart can get through and help me improve.