Wrong time, wrong club for the player. City get most transfers right. I'm sure we did our due diligence with Mangler, just as we did with others. In this respect you can blame Txiki, Soriano & Pellegrini as much as you can Mangler. Personally, I think you're being unnecessarily harsh.
He did his very best, which was short of what we required, but it was his best all the same, & you can't ask for more from anyone. If he'd come to City 10 - 15 years ago, we'd probably be wetting ourselves with delight considering the utter dross we had back then. It's like some of us have gorged ourselves & become so drunk on success, we've forgotten where we've come from & how to be grateful & humble.
Good luck to Mangler.