Why is Carlsen criticized for poor preparation at World Chess Championship 2018? As of 2018-11-24, 11 games have been drawn at the World Chess Championship (WCC) 2018. A lot of commentators (in particular Alexander Grischuk) have attacked Carlsen for poor preparation.

But ... 11 games have been drawn. It's not like Carlsen is losing. If it's true that he is not well-prepared, what does that say about Caruana's inability to take advantage of that and win? Should he not be criticized for not being able to win against a supposedly ill-prepared player?

In fact, if Carlsen can manage to win this WCC without preparing too much, that's a ... success, isn't it?
Carlsen is being criticized for his preparation with white, particularly e4. He knows that Caruana is going to play the Petrof yet nevertheless Caruana equalizes effortlessly. Carlsen appears to have no new ideas in this opening. Since there is no more important competition he could be saving novelties for it tells us he has no novelties. No novelties = poor preparation. If he doesn't have an answer to this he shouldn't play 1. e4

Note that we have seen novelties from Caruana, not necessarily good ones. As black in one game he played Rd8 in a Queen's Gambit looking to provoke the reply Nd2 from Carlsen. That looked like it would be a strong response from Carlsen but he chickened out and played a much more drawish move suggesting that he believed Caruana had some big improvement planned.