Plenty of people tried to make you feel better, but Imma one up all of them.
I wiped a matched group on the first pull of Hauke Manor (regular, not even hard) when leveling WHM. For some reason my brain went "paying attention to tank's HP? ain't no body got time for that"
I've had to bail out of a Baelsar's Wall because everyone save me was at the bare minimum ilvl and it was a massive headache. The first boss took a solid 8 minutes to kill and I was 99% certain that we weren't gonna do the mechanics for the last boss with that kind of DPS.
Baelsar and Sohm Al are made way, way, way too annoying if your party is at the minimum because most of the boss mechanics suck.
Putting these two together is pretty funny to me in a way. Had an EXDR (Baelsar, particularly) last night with a Ninja who used zero mudras the entire run (not even Huton, he did have poison though) and would Mutilate a mob, run away from the pack, sit for a few seconds, and run back in. Every pull. Combined with everyone taking random mechanics because not knowing better or greed or both (I swear I used to be able to cheat that stun ;_ it was a run that was the longest EXDR I've had since I resubbed back in like October/November.
It took 19 minutes.
So eh. I'm pretty big on the whole notion of playing properly and people can in fact do better than they limit themselves to but, at the same time, situations like this are mostly just a "Well, that's unfortunate" and that's about it; never worth saying anything about unless the person is being a raging jackass on their own. And, hell, if he gave me Goad and the occasional Shadewalker, he'd still be a top 10 DF Ninja contender. Ultimately, dungeons are really forgiving content that you should treat as mostly your low stress thing; don't fret too much on 'screwing up', chances are likely everyone else is too busy expecting to be called out for their own mistakes to worry about the trivial bits OR they just expect it and can work around it anyway.