It's because everyone trying to take him on isn't at lvl 50 and they are still using ao2 gear.

Noone can complain about how hard he is until a group of the best 50's using the best of ao3 gear has tried to take him down. This would be a real test of his difficulty, because if the best players in game can't take him down then what chance do average players have.

Mainly this thread is to stop people getting angry at others because they keep wiping on the overlord.