PF Extreme Primals and Elitist Time Bombs
Oh boy. Some things we should be able to see coming from a mile away, but we don't because deep down we want to pretend it won't happen. It seems to me that there are quite a few people that can't deal with the reality of the party finder, in that party finder in no way guarantees victories on hard content just because someone calls something a farm and requires really high ilvl scores. I have found that if the group has already beaten an encounter that any problems preventing the group from downing that same encounter are usually resolvable with a little coaching and some pats on the back. Only problem is that more than half of these groups end up getting destroyed by elitist time bombs who go passive aggressive on party members, pissing the hell out of them, and thus causing further wipes.
My advice: If you see a guy saying "If x wipes the group, I'm out" or "Maybe I'll take you seriously if you don't die to x", use your better judgement: boot the guy. The elitist just sees other's as pawns to get new loot and associating with him isn't going to get you invites to future parties. It's better to earn the respect of good players still learning the fight than to pair up with a guy who sees other's as mere stepping stones to some virtual item.