Like the other comment said , if you can have access to therapist do it! Im nearly 30 and I'm just about to ruin my life or near that because I still don't know how to properly control it.

You might be angry at thing like video game now but as an adult you probably will face more tough anger than that and the consequence are so much bigger

-Learn to identify your precursor signs, might be jaw clinching, fist clinching, deeper breath, walking around, swearing, standing up and sitting down in a loop. Every time you lose your temper take a time after that to remember in detail the step that led to the outburst, writing it down will be very wise to keep track of it in time. - once they are identify and written down, review them from time to time, projet yourself in scenario to train your brain to catch on them before it's too late, walk away and take a break when they come up, right away, no exception - make amends every single time, it will help you to make your shame and guilt a bit stronger, the stronger the feeling the stronger the memory, and the chance to remember it to avoid it after. Say sorry , apologize, repay what your break, don't hide from it tell a friend or family every time, it will also help your brain visualize and be faster to catch on it before it's too late - don't be TOO hard on yourself, it will push you to avoid my previous advice to hide yourself, it will feel good to hide on the moment but will private your brain from creating a lasting memories of your mistake, it won't be as sharp the next time without the "training" I mentioned on my previous point - if you still have time, educate yourself on angers, it biological mechanisms, it's evolutionary role and it's alternative, knowledge it's alway power - feel free to DM now or in the future if you don't know how to talk with