I've had anger problems since I was a kid, pretty bad, I've somewhat managed to control it over the years. Almost got into it with my dad once because of it, but he was drunk and saying stupid shit with his friends, so of course that set me off, but that's a story for another thread.
Anyway, I haven't really dealt with it in unhealthy ways like hard drugs or anything, I usually just keep to myself and let it subside over time, I am also very passive aggressive when I'm in a bad mood and simple things like for example people not hearing what I have to say and having to repeat myself more than twice or people not understanding what I mean usually escalates my mood.
Sex and/or fapping is a good way to keep me chill, activities help too, find what you're good at or like to do and do it when you're angry to calm down. For me personally I love martial arts so I can do a bit of shadow boxing, throw some kicks, hit a heavy bag...etc. all help release the anger and frustration. I also love art and am pretty good at drawing, so drawing helps calm the mind, the anger can even be used as inspiration to draw something cool. Find what you enjoy and do it to calm yourself.
Though I do want to add that I never want to get rid of my anger completely, it has given me strength in situations, it has gotten me out of trouble and won me many fights.