I agree that Brady in 2019 wanted out. But that is because of what happened in 2018.
After NE won the 2018 SB, Brady wanted a multiyear commitment. Bill the GM wouldn't give him more than 1 year at a time as he thought wrongly that he could get a better QB and wanted the flexibility to kick him to the curve a year early rather than a year late just like a JAG.
Bill the GM should have given Brady the treatment a player of his stature deserved, like Kobe and Manning were given by their teams. Manning retired a year too late, was awful, but he was still better than the other Denver QB of the future, and won a SB.
So yeah, in 2018 Brady wanted to retire a Patriot and checked ou in 2019 cause of Bill the GM.