You're so angry.
Okay - Inter - Mancini - Oh yeah - three CONSECUTIVE league titles, and three domestic cup's in 5 years?
Fuck me that's shocking.
Oh wait it gets worse - He'd won the league with both Lazio and Fiorentina in the 5 years proceeding that, he was clearly a risky signing by the Inter board.
Ranieri - took the team from the 2nd division to 3rd in the first division.
Prior to this, he had managed Chelsea, Valencia, Athletico Madrid a d Fiorentina
Yeah he only won some league 2 titles, the Intertoto cup, the super cup and copa del ray - so not the most impressive management haul - perhaps the fact that so many household names in European Club football signed him, meant he was considered a better than average manager before joining Juve.
Leonardo - a definite gamble but also seen as an legend with in Milans ranks - won't be the first time a club legend lands himself a job without proper qualifications and won't be the last.
Ferrera was the assistant manager of a world cup winning side - regardless of whether they were lucky or should or shouldn't have won it, he was still the Assistant manager.
He also spent some 10 years playing at the club.
So,yeah - sentiment aside - I'd say all of the above were more than qualified to sit in a pigeon hole other than 'average'