I'd say the list is short - i.e. teams that have ever been to a SB.
Houston Texans
Cleveland Browns
Jacksonville Jaguars
Detroit Lions
I don't think it's about folks feeling sorry for Culley as much as it is the big picture optics of this franchise since 2018 after Bob McNair passed away.
It's been a clown show since then, and while clowns can be very entertaining, football fans would rather have a different type of entertainment when you have a truly competitive team capable of competing for championships.
It's been reported that Caserio wore a headset in NE to learn, but not to give advice.
Belichick had
Ernie Adams in his ear to give analytical information to him during games that helped him make decisions and also helped with evaluating players for the drafrt. Ernie earned six rings in that role and retired last year.
I think Caserio wore the headset here and then started telling Culley what to do when he realized that Culley was simply incapable of making head coaching decisions during games.