very few tanks and some of them suck in dong their job

[Zyeriis]

A tank who insults isn't a good one. But one who can't keep the agro doesn't suck. Sometimes, if the DPS is TOO good, THEY will get the agro, no matter what the tank does.
It happened in the first dungeon I did.

So I would ask that you don't go around saying that some tanks suck. Just give them time.

Actually...that shouldn't be possible if they're attacking the same enemy (and start at the same time). The tank should be spamming savage blade combo to maintain hate, I haven't seen a dps steal hate over that ever.