This might be a useless rant for some, and I usually hate going to forums just to rant but still.

Killing off content by giving no incentive to the players to complete it and when you are too late for a week you can't play it anymore because nobody will join your party.

I guess that's to be expected in an mmorpg, but still, the few raids the game has, it's already hard to find people playing with you, and then this happens.