I don’t doubt frustration could have played a role, my only thought is that we needed to add five guys for the game so three players had to go (and DA probably made the wrong choice as he was known to do). I don’t think the coaches would have disagreed with him if they didn’t feel there were better options than Miller for IR/release, but I can see why someone like Williams would have stayed over him.
With Adebo on Harris on IR and the decision on shipping Lattimore likely made before the Panthers game, the team could make the argument (truthful or not) that they put a premium on keeping DB’s on the roster over an extra RB. Our starters will probably be Taylor, McKinstry, and Payton if they are healthy, and they will all get more snaps than any RB not named Kamara.