Buffalo fans jump into tables before games, they're not the smartest bunch in the house.
Allens passing attempts haven't noticeably decreased nor increased, everything stays put.
The only thing that has happened is that Allen has not adjusted to the defensive revolution of the NFL and proceeds to play hero ball, which leads into picks.
It's an absolute anomaly for a football team to be this statistically good, yet lose as often as they do. Kurt Benkert, some may know him, analyzed in a YT video what Allen tends to do, which is, instead of taking the available yardage, flaming a deep ball into coverage to force something.