Despite promising myself never to quit instances due to poor DPS, I bubble-hearthed my first instance this morning.
I got into H DTK, reasonably geared healer, leveling gear dps... No problem, I can live with that, I've got toc25 and onward gear and can do 3-4k dps. I ran with people with 3-4k gearscore before without problems; or so I thought.
25 minutes later, we're still at 2nd boss (the skeleton guy), and I'm doing more than 50% of the dps, including on the boss. The members? Hunter: auto-shot all the way, volley on mobs. DK: dies whenever he can, void holes, corpse explosion, etc. Warlock: bad gear, but the most decent member of the dps. The average DPS of the 3 was 1.5k - 2k on the boss. Most of it was from the warlock, with the hunter and DK averaging 500dps.
Before 1st boss, someone dies in a void hole, and asks me to res him. While we're still fighting 3 mobs that are still alive. Uh-oh, noob alert is tingling. I'm a patient guy, so I just tell him I can't res in combat.
When we hit 2nd boss, I go about the usual way of tanking: I grab the casters at the bottom, and dps handle the mobs coming down the stairs. Turns out DK and warlock couldn't handle the adds on the stairs, and warlock got aggro and died. DK survived by running down toward me. Hunter survived cos he was hitting my adds and didn't aggro the stair mobs at all. So I end up grabbing all the adds at the bottom of stairs.
Adds are down, starting on boss. That's when I notice all the hunter's doing is auto-shot. I'm really peeved right now, cos earlier hunter was complaining about me pulling slow. I ask him to use some of his other skills, but nothing happens. Probably afk. I take a look at recount, and the DK and hunter are doing 500-600 dps.
I just lost all my patience at that point and bubble-hearthed. On hindsight I could have just teleported out of dungeon, but when I bubbled and hearthed, I was still in the party so I could see the last message the DK put in before I left the group: "hey man, you're letting us die". Hell yeah, I sure am.
My apologies to the healer and warlock, if you're reading this, please forgive me for abandoning you 2 with the 2 failDPS. To the warlock, glad you won the helm off the troll boss.
To the 2 fail DPS... go practice on a target dummy. ANYONE can do more than 600dps on a single target. Please. For the good of mankind. For all the future groups you get into. Do it so no tank will want to abandon your group... let me not have broken my resolve in vain!