I failed to mark her off on my list
Is there a reason why you want to mark her off?
She constantly talks to me about how I'm rude to her whenever I lose at games.
Well, you shouldn't overreact.  Just self-reflect first, because you might be coming off as a bit rude without knowing it. You might just be naturally defensive and all she wanted for you is to calm down a bit.  I'm sure she'll understand that you get emotional at times, but you should try to improve your reactions for her.
SHUT UP, I fucking hate her and I just want to be left alone.
But this is the reason why your girlfriend was so mad at you in the first place.  I have now seen that you have a tendency to overreact to situations, and to respond with anger.  You should work on controlling these reactions, perhaps with a therapist.