As others have pointed out, part of the problem with Manning is he is inexperienced. He's gone in, tried to change everything from day one. You don't do that, you assess the current situation, the resources that you have and then, aligned with the objectives you've been set, establish a plan. You may have an ultimate goal to play in a certain way, but you bring that in as and when the circumstances suit.
An experienced DoF would have helped, a lot. I think Manning has potential, but he needs someone to advise him, to help him reflect.