Crosby is the Penguins. Malkin has sucked so bad lately, who has done all the job? Crosby. Without him, the Pens wouldn't even be in Pittsburgh in the first place so there wouldn't be a team there anymore.
Then Crosby gets so much crap all the time about everything. It's easy to be good when everyone's behind you, and saying things like, "Oh, look how good he is, ect." Everything Crosby is doing, people find a way to criticise it one way or another but he's always on top mentally. To go through the stuff he goes through and still be on top the way he is, he's got to be better.