I'm super upset Brady didn't retire in the sunset like we all hoped, but it sounds like people wanted Belichick to sign Brady to a massive 4-5 year contract at the age of 40-41?
Even Brees has been living off of 1-2 year contracts since 2016.
I honestly don't think it was money. Brady was pissed at Guerrero banning and it made him disgruntled. After that, every little BB quirk probably annoyed him more and more. He and Gronk likely complained to each other and both bounced when they could.
I know they're professionals but they're also people and we can all relate to the feeling of hating your boss once he screws you over. Brady knew his talent and was tired of always being linked to the guy he grew tired of.
Just my opinion. BB's quirks drove him away. That's the other edge to his coaching/gm sword. The same attitude that molded Brady into a pure winner with an amazing work ethic ended up being what drove them apart. (again, my opinion)