I recently got out of a Mentor Roulette Duty in Wanderer's Palace, and at the start they did a giant pull of 7+ mobs(which is difficult for some healers). The healer was doing fine, but then when he did another giant pull, he didn't have cooldowns until when his HP was already low. I noted that he should use Cooldowns when doing big pulls, but when it turned out the healer had gone AFK for a minute, I apologized as needed.
However, the rest of the dungeon he was being a snark about Mentors in general being unhelpful or critical or nosy. Is this how most people see mentors? Because if so, it shows that the Mentor system is failing, or that some players view mentors as unreliable and unhelpful, possibly because of their own experience of their NN on their home world.