I'm going to let a horde of zombies kill my dad because he was trying to make me mad by picking up the items I wanted
Why do you think he was making you mad?
He just wants me to fail
It can be frustrating when your dad gets things that you wanted, it is okay to feel that. You should let him know so that you can do things together without him annoying you.
Nah, he is no longer in my life, I can't care less.
I'm sorry to hear that you've cut off your father in your life just because you got mad at him on a video game. You should have fun and not get mad at people when playing a video game and I do not think your father wants you to be mad, as he was just trying to make things fun for the both of you. Try to reach out this time with your dad and see if he wants to play again.