I am also quite frustrated by this. A while back I got placed into a 70 dungeon with 2 dps that knew each other and clearly boosted. We could not clear the first boss. The blm never used enochian, the drg never used blood of the dragon. I stopped to explain mechanics. I even spelled out the basic rotation but there was zero improvement so by the fourth try I just left.

This was an exceptional case but I've seen a ton of people who just muddled through the msq and are not simply bad but cosmically incompetent; it's hard to believe they aren't trolling.

I'm not expecting purple parses but when the roulettes throws us black mages who don't even have fire IV on a hotbar its a problem. and I wish there was just a teeny tiny bit of gatekeeping before endgame or roulettes or something that required a player to show a basic understanding of how their job works