Well, this is a bit annoying. I very much doubt he has said this but if he has, I don't blame him at all. Rather, I thank him for 5 years of boss service, for signing the new contract, thus enabling us to get a good fee for him and also, I think it's good that he's been honest. Rather that than months of speculation and twitter quotes from utter tits.
Again, I'd rather a player be honest and transparent. Gives us time to line up replacements and means the fans know what's happening. It's no secret that he could be winning huge things elsewhere and it's not like he's a born and bred blue, is it?
In the vastly more likely case that this has been incorrectly quoted or taken entirely out of context: football journos are (mostly) tits.