What has he said wrong?

That he made a mistake.....well yes he did. He also explains that mistake in that he hired a foreign manager with little experience, which most on here criticised him for, so he is owning up to it.

That Christiansen clearly couldnt motivate them. Obvious. He also wishes TC well and says he will be a good coach

Think people are getting bent out of shape over nothing here, he is saying what people are thinking, he doesn't overly criticise TC, he just says what is blatantly obvious and what many people have said on here.