Exactly. I don't know if you saw this on Bills Mafia but it backs up what you are thinking:
Bills fans are particularly adept at spotting emotional incongruence, and calling players out when they see it. The reason we love Jim Kelly is that when he was playing, he was one of the most emotionally congruent players we ever saw in a Bills uniform.
He bled the red, white and blue. There was no question about his disappointment when he did not play well, and he was blunt about his own performance, and even about his teammates at times.
In contrast, you can see the fan base turning against Manuel already in part because the seeds of distrust have already been sown when he repeatedly refuses to authentically own his mistakes. He seems to be a man who blocks out obvious problems to the point where fans don’t have a real GPS coordinate on him as a person.