Unfortunately there are people for everything, The worst kind are the ones who complain all the time from the start to the end of an instance and then you have those who refuse to have respect for one little mistake you make. Life will not go away just for a little miss,
Then there are also those who are not taking in any tactics o just get stuck you ask them nicely to listen to tactics that might help.

I have many on blacklist but I learn never to see them again, which is good.
Just keep playing your game do not care if they do not let them ruin it for you to have fun anyway. Because that is what the game is all about that many people forget.