Horror story time.

I was playing DPS, and as i was supposed to i used Diversion at the start of the fight.
Then Diversion ends, 90 seconds cooldown to go...and in that time i end up ripping aggro of the tank and dying.

The tank is all "Use diversion noob!"
Trying to explain that it's on cooldown gets a "I don't care!"
...How? It's on cooldown, how am i supposed to use it?

He just yells abuse at me for ripping aggro of him, while he is in DPS stance and refusing to use enmity combos or his AOE enmity generator, because they have lower potency so he will lose DPS if he does that.

I. CANNOT. USE. A. SKILL. THAT. IS. ON. COOLDOWN! How hard is that to understand?

Well, since the only way to avoid ripping aggro of him and dying is to not attack the enemy at all, i'll just do that then.
Then he yells at me for not attacking instead.
And the moment i go back to attacking i rip aggro and die, and he yells at me for that.
Well, what the hell am i supposed to do exactly?

The other DPS was having the same problem and also getting killed and yelled at.