Did you know not performing as you think another player should in a group

[MicahZerrshia]

None of that is intentional. Its called the way they play.

If you are just a thunder or blizzard mage, you are not trying to play well, you are intentionally playing poorly.
If you are not playing optimally when you can, if you know you are not doing your job but don't care enough to try, you are intentionally playing poorly.
If you do not take the time to learn your job or even reading the tool tips on your icons you are intentionally playing poorly.
If you are intentionally playing your job a certain way because that is your preference when you know there are better ways to go about things, you are intentionally playing poorly.
Especially at level 70. If you still do not know your basic rotations you have put 0 effort into learning anything and therefore you are intentionally playing poorly. Ignorance by choice.

Funny, this all sound pretty intentional to me.

But if you want to make excuses to be carried I guess they are hard to argue against and best to just ignore instead of making a valid argument outside of "meany"