Quote Originally Posted by Zarador View Post
Because some players spend so much time insuring that they are "doing it right" that they forget to have fun along the way.
Totally Agree with this.

Don't complain about "bad" players, just teach them about the mechanics and ask them what they can throw in to master the fight. Or find someone who is leading and willing to give hints/good explanations.
This will encourage them to think about their own class/skills and what grouping really means. If you are only asked to do this and that you will loose interest and never become better.