Quote Originally Posted by hasana View Post
But it only works when the player is badmouthing there is no option to report a mentor like described in OP post where he queues for mentor roulette and leaves because he doesn't get what he wants.
That's because leaving instances and taking the appropriate penalty is not against the rules and it's not even breaking normal player etiquette. You also can't know their intent or whether they are using mentor roulette.