And THAT is the key to this in my opinion. I think there are a LOT of people, including his fellow professionals, who may be JEALOUS of his success. Because I rarely hear people say that an artist's work is "offensive" unless they are talking about someone who engages in producing deliberately insulting material like say, a D.W. Griffith.
Liefeld's work "offends" them? Or his SUCCESS?
Trust me, I've seen a LOT worse than Liefeld, one of them is still drawing a top selling book--rather than mentioning him by name, I just choose not to buy his book! And how about that "bouncing Catwoman" drawing that popped up on the web a few weeks ago? Normally, that gentleman does good work but even he sometimes mines the same "offensive" territory from which Liefeld is often accused of tapping.
Liefeld ISN'T my choice of the best pro working today-- but he is far from being the worst. Let's not forget all of those "Adam Hughes-clones" out there who actually make Liefeld look like DaVinci! Heck, even with his "pidgeon-chested" Captain America, I don't think he's ever given a character TWO LEFT FEET! I'm not kidding, it was actually on the splash page of an otherwise nicely rendered book!