Tank disrespect.

[Naryoril]

People in this game are very selfish. Your going in to a dungeon where you know your going to have trouble and place the rest of the group at a disadvantage. So instead of working to fix the problem you say to hell with it, other people will just have to suffer because I'm selfish.

...

You can craft your own ilvl70 gear. Therefore there is ABSOLUTELY NO EXCUSE to be anything less than ilvl 70 when you hit 50. Once again you prove that yes in deed you are a bad\lazy\selfish player.

...

it's entirely possible that even though you marked which DPS to kill first you were probably attacking the wrong target.

..

If you only needed the quest for your relic and you obviously know your going to be worthless in the dungeon why not get your friends to run the dungeon with you. This IMO would be the polite thing to do instead of being a selfish liability for the rest of the group.

TLDR Yes you are a bad tank...get better gear and try again

Let me address a few points here

Yes, obviously there are some really selfish players here, thinking "how does this player dare to be geared worse than i am? He'll take up 5 minutes of my gametime. I was always perfect in every regard." You know, you only improve your tanking by actually doing it, and you only really learn it if you are at your limits. If you only ever run dungeons when its horribly easy to tank, you will never be able to do it right when things start to go wrong.

On top of that: i was on a break for a few months and i resubbed because some friends started playing (i also changed server because of this). Last time i played, there was only ever one person who thought you are a liability in AK with iLvl below 70 and abandoned FC members in there because of that. As a consequence he was kicked from the FC. Note: This was before the dungeon was nerfed.

And: In all the later runs in there (or any other dungeon from the high level duty roulette) i never had a group dealing that much damage again. Nor did the healer i was with during that run (he's the only of my friends who was lvl 50 at the time).
So much about knowing being at a disadvantage/liability.

Now to the next part: So you suggest before people go to a dungeon where iLvl 55 or 60 gear drops, you have to grind the crafting profession for that class to 50 and craft iLvl 70 gear? Don't you see what's wrong with this trail of thought?

Next: If there are 2 mobs of the same type and the DD attacks the one which was not marked, it can't be the wrong target. Even if, why not simply tell the tank? I'll pick that up again in the TL;DR.

Next: Most of my friends were behind in level (since my paladin was already around 35 when i resubbed, in connection with the 50% higher-class-xp-bonus and the 50% rested-xp-bonus), even now we can just barely put a group of 4 people together. And since i changed server, i don't know anyone else here.

TL;DR: You apparently are the kind of unhelpful elitist player new players often complain about.