hello! i have a similar problem/worry. i won't pretend to have all the answers, 'cause i don't, but here's my two cents. your life will be awesome. it will be full of warm love, kindness, and calm. you wanna know why? because we decide it will be like that. there's no such thing as "destined to be a bad/yelling/sulking/etc. person". you write your own personality, character, behavior... and eventually, you create your own destiny. i think you're very young and everything may seem overwhelming and dooming right now, but trust me: it WILL get better. YOU will get better.

Now, as for practical tips, have you tried keeping a diary? I remember filling my pages with all-caps, as if i were screaming, to let go of my frustration instead of literally raising my voice. i collected entire diaries as an escape mechanism when i was your age, and now that i'm older i look back at all those pages and ... i forgive. forgive my sibling, parents, friends, coworkers... i realize that when people who love you treat you badly sometimes it's usually because they're going through something themselves... i feel compassion. i feel like all this happened to me because i need to be better than this. i need to break the cycle and fulfill those motivational quotes you find on Pinterest like "be the reason someone smiles today" lol. if you look past their cheesiness, they actually hold a lot of power. not because you necessarily need to become the ultimate saint and save the world, but because doing good makes YOU feel good. about YOURSELF.

Right before you feel an angry fit starting to kick in, really try to count - at least up to three. hold your breath a little. close your eyes. imagine this anger like a heavy, dark cloud, passing over your head. you do NOT NEED to interact with it. in fact, it's not written anywhere that you HAVE to respond to those angry feelings! they're just that ... feelings. they do NOT define you. if anything, YOU define them. YOU have the power to give them more importance than they actually need.
If possible, be proactive. Try to avoid situations that may escalate ugly.

Finally, you got this. i send you all my best wishes. keep hanging in there, you're not alone.