Need help with recently developed anger issues.

So I’m not sure if this is just normal anger or if it’s actually an issue but recently I’ve been getting extremely angry at certain things that never really triggered me before. It’s mostly just on a game I’ve started playing again called rust, I play with my step dad, who’s a huge gamer, and the only reason I started gaming when I was a kid. He’s usually pretty rough verbally, he gets his point across but I feel like he’s just extra derogatory when we’re playing this. I’ve never been soft, he’s really the only person who can verbally hurt me. He says the reason he was meaner as a kid was so I’d be tough, because I was a really sensitive kid and I got bullied a lot. He wanted to make me “bully proof” so he just was mean, and it worked, but now he’s got this spot in my head that for some reason his opinion matters more than everyone else’s. I’m 17 so at first I assumed I was just feeling what normal adults felt when they got mad, assuming it was normal but I started to not be able to calm myself, I just feel like I need to hit something and that feeling doesnt go away and frankly it scares the shit out of me. I don’t know if this is something I can help or if I just have to grow up and deal with it but any advice is appreciated. Sorry for the life story mid way through but I went back and added it. Hopefully it helps. Like I said any answers at all are greatly appreciated.