Of course, nobody can get inside Bill's head.
But, I think I know enough about him to have an opinion. He did so much good hard work here, which was rewarded in success and accolades. And I love his genuine presence in the pressers, which included irritation along the way. He's always been kind, patient and accessible to fans, as far as I know, and he really loves coaching.
I think Bill Belichick has the right to be resentful. And he doesn't forget things, for example the "**** you, Tom" to Jackson when he stopped in at ESPN I think it was years after 2003.
He's still tight with Parcells, and they consider themselves to be Giants guys. They both didn't and don't appreciate how Kraft treated them and that's fair. When you throw in Fairbanks (who also coached later in NY for the Generals), it seems like when you pour everything into the Patriots and make them great, you get driven away. Kraft has so much in common with Billy Sullivan it's scary.
Anyway, Bill's one of my all time favorite coaches and I'll take the six titles, even if we should have worn our real logo and uniforms.