F this... vent... Opinions?

Kilie
Let's start this out I am 35w4d.... 
Sorry totally not pregnancy related. But I totally enjoy being yelled at every time I speak my opinion on something anyone fucking disagrees with. I always get my ass chewed anytime I say something they don't like. I know I shouldn't do this. But hear me out..? My little brother is 8-9 years old. He's the only child living at home half the year. (My other siblings live out of state with their biological dad) he is absolutely spoiled and he's a dick. Plain and simple. He's rude. Back talks. And could literally get away with murder. And yes, my dad got busy with his new wife, 10-11 years after having me. Making a little shit of a boy. So anytime I come over, if he starts being a little ass hole to me, I tell him to knock it off... Right? Am I wrong to do that? No? I didn't think so. Plus I'm not mean, I actually ask a few times and if he doesn't stop, I yell. But I only yell after the 3rd time. But as soon as j yell, or even ask him to stop the first time... My dad, and his mom... ALWAYS jump down my throat and tell me "he's just a kid." EXCUSE ME BUT WHAT THE ACTUAL FUCK!? If he's sitting there, while we're watching a movie, and is on his fricken phone playing games, WITH THE VOLUME UP CRAZY LOUD, IM GUNNA FUCKING SAY SOMETHING. no. I don't live at home. Yes I'm 19. Yes I am engaged. Yes we come over often, to see my family. Dinner events and what not, I mean they're driving distance so why not? Okay... So after all of that, is it wrong of me to say that I don't want my son around that all too often? My dad clearly doesn't respect me. And neither does his wife. They clearly don't know how to handle their own kid, why would I want my son around that? Is it wrong for me to just be like, "if you can not respect me or my opinions, my son won't me here." Please help me out and thank you for listening to me vent...