Awhile back, I was tanking DRK in a 50 roulette w/ full augmented ironworks. The dungeon was Qarn HM. I pull to the first wall (2 groups, but technically 3 if you count the head that doesnt aggro with group 2). I was in tank stance and lead with shadowskin as my first cooldown. The only ability the SCH used was physick and wasnt even spamming it back to back. My HP kept going down, I used living dead, and i died due to not receiving my max hp in healing. I thought to myself.... "guess im pulling 1 at a time". Having had no one comment in party chat other than the initial "howdy", "hi", etc at the start of the duty, the healer says something along the lines of "what did you think was going to happen pulling that many mobs?"
Im understandably a bit irritated. I had run this dungeon several times in the past as a tank and healer, and in my opinion, the healer should have been healing more. I said something stupid like: "I thought you would have healed through it by healing more"... and we were in an argument. I made some other comments in the short argument like "maybe use more than just physick". At one point a dps took the healer's side saying the pull was too large...
Now I was the tank, i could have escalated til i got kicked and instantly requeued, we were at the beginning after all and I was pretty irritated with this healer, but i decided to stick it out and focus on a solution. I was going to pull less anyway so i just said "fine. ill pull less for you" (admittedly being irritated).
We died at the first boss... I had calmed down from the earlier argument and said "welp, that was bad. Anyone need a fight explanation?". The healer and DPS from earlier both said that they did. I afterwards said "cool cool, anybody new btw?" Both the healer and DPS mentioned that they were new.
To shorten the story, I ended up getting 3 comms at the end of that run. The SCH even let me give them a couple pointers. The moral of the story being pride and a desire to place blame / be right can cause issues that can otherwise be avoided. I wonder how the run could have gone if i didnt intially reply with something that would lead to an argument. Focus on clearing the run over being right, and many horror stories will go away.