you're not responsible for what other people do, you are responsible for what you do, so behave well and don't let them bring you down, don't even in a game situation.
my grandma used to tell me "if someone behave bad with you that's not an excuse for you to behave bad in response"
My Gran used to say "do unto others as they would do to you, But do it first a fuck off before the police arrive" She was quite a character my Gran.
doing my frost mage thing
sheep one of the adds which I had already sheeped and now has the enrage on it which means it cannot be cc'd for a certain amount of time, so I ignored him and sheeped it again when it was possible.
While it can't be sheeped hes crying at me and telling me to sheep it and counterspell it.
Frost mages dnt just bring polymorph to the table.
There is massive amounts of control you could have done to keep that add in place.
As far as i know. Adds do not suffer DR or immunity. So you can spam polymorph on it.
Mobs can not enrage while they are CC'ed by polymorph.
You did not watch your CC as any player new or old would do and furthermore not used any of the other control abilities in your arsenal.
I would not say 'l2p' but i will say that you need some practice monitoring your CC and reacting to the flow of the fight.
Not being rude.
On another note: You will get elitist a-holes that will think they are WoW Gods or trolls.
But such is the same in every other game. Mmo or not...
You may use the /ignore function or the report function that is built into the game for this purpose.