It's not about his past results. Ofcourse everyone is grateful to the job he's done here but maybe he's at the end of the line and not able to motivate the players or himself anymore so it would be better to move on I guess. As I've said , staying 4 years at the same club these days will feel like an eternity. 3 seasons is usually the limit when you're at a top club nowadays.
He then went on to lose two important players in defense, he went out to Real Madrid in the last minute to a soft penalty. Mind you he's also doing well in Serie A if you look at the points total, its Napoli that is punching well above their weight.
What I'm trying to say, is that you cannot expect him to reach the CL final every year, nobody can do that. You are setting extremely unrealistic expectations on Allegri if you think its the end of the line because of this season.
