Well, There is a reason to all this frustration: Our team is not playing good football and we lack capable players to fulfill the roles we wish for.
I agree: melting down and blaming Allegri is stupid, but at the same time its totally understandable given our performances this year.
The most important thing now is that Allegri and the rest of the team really works towards fixing these issues rather than hiding it under the carpet
This year was also incredibly frustrating for us "allegri nuthuggers" (as xperd put it). We played poor football, with rare exceptions, and seemed to peak far too early, with Allegri overusing our starters early in the season, burning out the majority of them, and leading to us looking out-of-shape and out-of-form when the important part of the season arrived. Add to that, a huge amount of injuries, probably in part because of burning the players out.
He needs to get his fitness and training staff sorted out, and then get his periodization and peaking working like it was his first three years... and he needs to rotate better early in the season.