People should have a look at what Mancini did with Lazio before questioning his managerial ability. Lazio might not even exist today if not for his managerial ability as virtually a rookie as a manager. He is a top manager, not the best and certainly not the most player friendly, but has delivered three trophies in 1 1/2 years. As soon as we hit a bad patch the hounds are out, who needs the media when some of our own fans smell blood?
Mourinho - the best manager in the world - has basically lost La Liga already to Barcelona after 8 games, has failed to deliver the Champions League in two attempts with the most expensive squad in the world, and currently has Real Madrid at risk of finishing 2nd in our group which would mean facing a group winner in the next stage. Now if changed Real Madrid to City and all of those facts remained the same, would the Mancini Outers be saying the same about Mourinho? Managers like players and teams have bad patches, in fact Mourinho got sacked by Roman for one of his few bad patches at Chelsea in a move that Roman has regretted.
It also can't be ignored that Mancini asked for players that would have improved us quite a lot (RVP, Hazard, De Rossi/Martinez) but the club was unable or unwilling to get them. People will say "He's already spent loads of money so it doesn't matter"... guess what, Mourinho has spent loads of money then spends more! A club/team never stops improving. So did Guardiola, Barcelona spent a lot of money under his reign and not all of his signings worked out. Barca won something like 4 or 5 trophies then splurged approximately £55million on Fabregas and Sanchez! You don't stand still in football.
Yes there are managers like Klopp who are doing an amazing job on a budget... guess what, so did Mancini at Lazio! They were bankrupt and asset stripped of Crespo, Nesta, and other good players, he got them into the Champions League and the UEFA Cup semi finals under these circumstances! It's a lot different when you're at a club with money, they don't work like clubs on modest budgets.