As a warrior can't say I've ever had trouble holding angry against anything. Only wipes I've seen is from dps not knowing mechanics (killing adds/activating stuff) and one time where I didn't get any heals... When I asked the healer what he was doing he said "don't be so eager, i was organising my items"... I left the group instantly. I queue dungeons to kill stuff, fast, not to sit around while you organise your inventory.