When is it a good time to leave?

[Valarian]

I stick it out with a group unless someone is actually being mean, even if I know I'm not going to be able to beat a dungeon because the group is mismatched, or uncoordinated, or simply out of time.

I'm a healer, and while I don't like doing the face plant when I throw the first cure on a tank that doesn't know what they're doing, it's how some people learn they can't succeed without me, and so have to do their bit to make things work.

Holding someone's hand in a dungeon is a pain in the butt, but if they're not jerks, then chances are they come out of the experience having learned something, and by that token you will have enriched the experience that player and of every other player who gets paired with them in the future. Forging better players out of bad players is an investment in the future of Eorzea. The best treatment for ignorance has always been education. I don't blame players who bail on a group out of frustration (it is a game and is supposed to be fun), but if one has the patience or temperament I'd ask that one to consider doing the best they can to improve the players they're paired with.

[16bitBounty]

As the healer, I'll only leave if the dungeon has only been going for a short time, or we've wiped several times and I see the completion as a hopeless task. If I'm being attacked every time I throw out a heal and it's obvious the tank isn't doing his job I'm gone.

[Anders]

You are doing the right thing, in my opinion. Giving PUGs pre-fight advice is the way to start things off on the right foot. Leaving when one of the party starts acting juvenile and abusive is just fine.

As you say, we play this GAME to have fun. When self-appointed "elitists" start taking the fun away, it's time to quit the party.