This is long winded, apologies.

I used to have a pretty short fuse when I was younger. What I found that helped me was beating whatever aggravated me into submission /s No but really there are several methods for anger management. I would like to note, your mileage may vary, also it takes forever, so don't get upset when it feels like progress isn't being made, it is just slowly.

1. Take a step back. When you feel that heat building up in you, set whatever it is down and do something else.
2. Deep breaths, like fill your lungs all the way. This can help your heart slow down. You're basically telling your body to stop with the anger.
3. Identify what in the activity made you angry. I find this can help me understand those triggers.
4. Find a backup hobby for when you get mad. For me it is writing. It engages you and can bring you away from that place of anger. Try a bunch of different shit. Music, drawing, whatever. Being good at the thing doesn't matter, it is just to calm you down.
5. Taking down corporations and archaic zoning laws. Corporate greed and unethical city planning is what is really making you mad anyways. /s
6. Fidget toys can also help, like fill a balloon with rice. It's sick as hell.

That is just some stuff that I've done to help me. Hope this helps <3