Mancini losing the dressing room

Just been reading Joey Barton's book, good read by the way, and he claims on the famous day when we won the title Roberto was going nuts on the touch line.
Apparently he was screaming "you're letting me down" over and over. Couple this with what we've heard about him yelling at lescott to stay back and it makes Barton's claim that the cracks probably started that day make a bit more sense. Do you lot think there's anything to the theory that his problems began or at least grew that day?
Apparently he was screaming "you're letting me down" over and over. Couple this with what we've heard about him yelling at lescott to stay back and it makes Barton's claim that the cracks probably started that day make a bit more sense. Do you lot think there's anything to the theory that his problems began or at least grew that day?