They are your parents, they are guardians, they feed you and put a roof over your head. Even if they nag you until you go insane, you always gotta remember that they in fact YOUR PARENTS. When they get you really angry, take deep long breaths and try to relax. You should also try to calmly talk to your parents about the frustration they are causing you, keeping things inside yourself is not healthy, and one day all that frustration will explode. Talking about things is never bad, and I'm sure your parents will get your point.
Maybe you can take a little break from your parents? Ask a relative if you can spend the weekend with them, maybe a retreat is something you need right now. The fact that you are always with your parents might be getting to your head, and you want to experience some freedom.
I hope everything works out for you.
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Hey man, take it easy!