Nerd raging over selling PR is dumb, but one thing that made me kinda get upset was when I was carrying someone and they'd ask something like "why didn't you heal me more" or "oh man I had that interrupt you shouldn't got next and I wouldn't have died". Never really made me rage, but in most cases if you got one of those "never been glad[insert excuses] but God's gift to WoW players" I just give them their money back after a couple games.
Smoking pot really helps too, it's kind of like sports where you just revert to instinct(wrestling comes to mind) and just play; whatever happens, happens.
"Yea breh couldnt get glad ever since bc cuz my partners suck, but imamazing"
I'd like those type of people shot by firing squad.