i'm a competitive submission grappler, and do a little MMA too. I can honestly say Jiu-jitsu has greatly improved my life in a number of ways, and i would strongly recommend it to almost everyone, including the OP. having said that, it's not a cure-all, or the solution to his problems. for that we need to look deeper, find the root causes and the catalysts for his temper.
I imagine the OP is in his late teens or early 20s, and lives with his parents. this is a crucial time for a young man.
when i was in the same situation no amount of broken boards or bricks, no amount of weight lifted in the gym, could suppress the rage my parents and siblings were able to arouse in me.
even now, as my parents are old and grey and i glide gracefully into middle age, even now that i am relatively calm and centered and reasonably happy, even now my mother has an innate ability to boil my blood.
in fact it's only now, as i think about what to write here, do i realize that most of my anger was caused by feelings of helplessness because i didn't have, and didn''t believe i could have, control over my life.
it's a long journey and one which i spent a good part of my 30s navigating. fortunately for Cacc, he has the internet, the manosphere, the red pill, and most importantly, he has girlschase. he doesn't need to wait till he's 40 or 30 to take control.
take control of your finances, take control of your love life, take control of your health and take control of your future. the anger will take care of itself.
claim your independence, move away from the well-intentioned toxicity of your family, set goals and reverse engineer the outcome so you can see the path you need to walk, don't fear straying from the path and keep your eyes open for opportunities along the way, but know that it is within your power and within your grasp.
and try to fucking enjoy it!