I like Diggs, he plays hard on the field and has a fierce fire to win. Sometimes that gets the better of him. I wouldn't be so quick to put the blame on Diggs for the Buffalo situation, watch the last drive of the KC game and watch Josh Allen ignore a wide open Diggs during the most crucial moments of the game that could have won it for them. There was definitely some issues between the two and I wouldn't be surprised if they were more on Allen.
When the players were initially taken off the field after the Damar Hamlin incident for what was being described as a delay at that time, Diggs was the only player or representative from the team, who went directly to the locker room changed and went to the hospital by himself without waiting for any kind of definitive announcement about the remainder of the game. That is the kind of guy he is, putting his teammate first and properly prioritizing the situation.