It's not that it isn't true. The problem is that he has said publicly that it was a mistake to come here - those are not the words of someone who is going to knuckle down and fight for a spot in the team and it is certainly not what CH would want to hear.
Murphy should start firing again now that Knockaert is in the side - when he was the only creativity in the side, the opposition ganged up on him. Now they have Knocker to think about, Murphy should be able to take full advantage. He has shown already this season that he is a very good player...