Referees gave him loads of decisions. Some refs - Mike Dean and Howard Webb, for example, both did this - used to go and have little chat with him throughout the game to make sure he was okay (what more can you ask for?). Clettenberg sent off Johnny Evans for bringing him down, Webb didn't send him off for the blatant flick at Parker's head and the gave him a penalty in the last minute to win the game. These are just big decisions off the top of my head, he probably got dozens if I really thought about it.
Also opponents didn't always have sly digs at him, some tried it on - West Ham, Blackburn, United games spring to mind - but not many at all really.
His time at City was hit and miss and a lot of it was down to himself and his own downfalls. His attitude and application in some games was appalling. He had more unacceptable performances than brilliant ones for us.
This is coming from a fan of Mario. I like him. I always will. I'm pissed off with him for all those games he was a waste of time because of how good he can be. Blaming everyone else but him for his downfalls is a cop-out.