I don't think you appreciate how much of a hit his career has taken by his performance since Brady left, the way he got fired, who replaced him, his failed job search afterwards, the stories about how he handled Mac Jones, and now this docu-series.
This will be the talk of the entire nation throughout the entire offseason. What's worse, is this is forever. It's not some off the cuff remark by a disgruntled former player to a tabloid reporter. This a high end production by a decorated Director on a high end platform like AppleTV.
By the time it's Bill's turn, Andy Reid may very well be talked about as the GOAT HC, further minimizing his accomplishments and magnifying his defects and failures w/o the GOAT QB.