Gisele wanted out for the same reason Brady wanted out. She felt like he wasn't getting respected enough and treated well for what he contributed. And she frankly probably got a lot of that from Tom getting disillusioned himself and bringing it home. It's no secret that a lot of the relationship soured in 2017 with
1. BB wanting to trade Brady and go with Jimmy (would have been a huge mistake)
2. BB making what many players felt was a selfish decision by benching Butler and Brady feeling like he cost him a milestone SB the year he turned 40 and was trying to make a legacy play while playing out of his mind.
The reality is, I think Kraft trusted Bill Belichick enough to keep the franchise upright and competitive post Tom Brady and was willing to allow Bill to end it earlier than he wanted to keep the relationship with Bill strong. Then Bill really looked like he got caught with his pants down making everyone think he was willing to start Stidham as the new guy and then scrambling last minute for Cam. Brady winning the Super Bowl made it worse and really soured Kraft on Bill. 2021 was probably a solid year for everyone. Bill got a QB and everyone thought Mac was looking like the best QB of the class. Then ONCE AGAIN, Kraft let Bill do something no other owner would let their coach do and make Patricia the OC. The whole league mocked the idea. Kraft gave Bill faith. It fell apart and Kraft decided at that point that Bill had been given way too much leeway. Once again Kraft felt Bill Belichick was allowed to make a move that made everyone in New England looks stupid because Bill was allowed to do something that no other coach would be allowed to do. So 2023 became another "sink or swim" year where Kraft decided that Bill picked this team, he wasn't getting do overs, he wasn't getting the cover of starting over with another QB. He had to make it work or not. And it didn't so Kraft decided Bill couldn't have all the control he was granted and couldn't take it away so he moved on.