Whats up with ppl on this realm kicking or leaving for little to no reason

dont play with Rhazzo-Tichondrius, he will kick you from raid even if you one shot the previous boss, dont die, and do fine, Beat Heroic mag going into echo and he said he wanted to make the group smaller. Can we stop wasting ppl’s time like this? I joined the group so I could try to beat the whole raid.