Sorry OP and others who are in the everything needs to be sunshine and rainbows hugbox camp but some times you have to call the baby ugly. If a person is under performing for that content they should be told they're doing so. It's up to them whether they correct this or not and it's up to the 3 others to decide if they're willing to put up with this or not afterwards. If they're not willing to accept accountability for their own performance they should be ready to deal with getting booted. I do feel some forms of insults do go too far but it varies. Through my time lvling drk, nin and now whm I've seen DPS under perform even what I was doing as brd back in the 2.x series, which is pretty bad to the point I looked at my performance and decided brd was not my thing. I don't expect Olympic Gold performance but I also don't expect a simple dungeon run to take 10+ minutes longer than normal if there's no wipes.