No, but it can be detrimental to team morale to have a player at odds with his manager and being outspoken about it.
As I've said several times now, if the player is unhappy he has the ability to confront his manager and have it out with him. Complaining on the internet is unacceptable, imo. And a bit pathetic.
Whether he speaks out in public or not doesn't really matter when it comes to team morale. If he's unhappy then he'll have an impact regardless. Speaking out publicly just tells everyone else.
And for all we know, he could have already spoken to the manager, chairman, owner, etc. He might not have done too, of course.
