Did you know not performing as you think another player should in a group

[Gwaeron89]

- If someone is underpreforming, tell them, give them tips on how they can improve. If they wont do this, then either ignore and finish the dungeon or kick them out.

Or just leave them alone maybe?
Unless they intentionally do some very questionable stuff like goint into 70 content in 60 lvl gear, who cares if people there underperforming. If you want your idea of "fun" being forced on others, there's is party finder where all specific moments like "top dps, 2 fail kick" can be explained beforehand.