It doesn't work like that. He picks the team, he prepares the team, he gives them direction, instructions and the motivation to go out and play for the shirt. Yes, occasionally he can do all those things and for whatever reason it doesn't happen but it's not a one-off we're talking about.
First thing he needs to do is cut down on this 'rotation' obsession. If you've got 25 great players like a City or a Chelsea then by all means but when you're putting players like Martina out on the pitch it doesn't stack-up. Change a few who need a rest but give the players a chance to play together and get some understanding going on. Players have got different players alongside them week in week out. No wonder there's a lack of cohesion and understanding.