Carlo is doing what he has done for the last decade.
He is a nice guy whom players relate to and want to play for. He goes in and the results initially pick up. That goodwill doesn't last though because he is tactically out dated and doesn't believe in intense training sessions.
A good first season has been followed by a downturn in fortunes that has resulted in him being sacked. That has happened at Chelsea, Madrid, Bayern and Napoli. What we are seeing at the moment isn't Everton breaking Carlo but just history repeating itself.
I will undoubtedly get slaughtered for this post but it needs saying.