People that wont get the tank time to built some aggro and complain after, why are und lile that?

I think this has been accounted multiple times here, but I was doing a bloodfurnace yesterday and tanking it as a feral. Then there was this mage instantly casting frostbolts also if I havent even hit the target, when pulling a group of 3. The whole run was running in a circle and trying to keep the aggro, so the mage doesent die. Of course while doing that the other dps got aggro and started to run in circles like chicken too. I thought marking mobs with a skull might solve the problem, so he knows which mob im a attacking, but he still casted his frostbolts on another one.

I died 3 times in that run, because the healer was focused on the mage not dying, the mage, responsible for everything died 5 times and we even wiped ones.

A few pulls before the last boss he got really mad and complained that this is the worst run ever and he is going to heart if we dont speed up.

It would have been a lot faster if u wouldnt just keep casting frostbolts or blizzards into group i havent even been able to hit yet...