Completely agree with OP
If you don't read forums you won't get your class's rotation right. My casual friends (people not good at computer games) would never dream of reading a forum.
They did very average dps. When they grouped for a 5 man they got the expected elitist response of "L2Play n00b!". Get out of my game, stop wasting my time and voting to be kicked.
That doesn't have to happen very many times before the game is no longer fun.
And they quit.
And while I still play and raid, I miss them. And I find I miss that kind of person in the WoW community. The kind of player that is social and pleasant and wants to play to have fun - not just all about epeen.
But hey - it's a changing world - and WoW doesn't want casual noobs playing it - I get it, we'll survive - I just think it's to WoW's detriment.
And I agree with the OP - a simple fix is to make class rotations more noob friendly (or at least not so punishing if you play it poorly) and raid content more challenging, much like the balance was in Vanilla.