My brother (almost 21),  and I (18 f)  have essentially had it out for each other when we were kids,  I'd be forced to fight with him and my second oldest brother (19)  for the only tv in the house till I was 10. But I didn't really hold anything against him since we were just kids. 

So as of recent every time my brothers on his phone with his friends he's been talking shit about me and only having the mic on when he knows I'm going to snap at him for telling his friends such shitty things about me,  normally i wouldn't care but this is a man who's specifically gushed to our mother about how I do the same thing (I don't,  my friends just hear how he's a cunt over the phone.  I don't need to talk shit,  he let's the shit talk for him.)

But where I drew the line is when yesterday I asked him to do a simple medial task.  Cook.  PASTA.  In x amount of time (half an hour),  and the amount of times I got told to eff off and all that were absolutely astounding.  He never gets in full trouble.  It's always me. It makes me livid just eating dinner in the same room as him and I HAVE to know AITA for not having more patience. 