You mean the HC who had failed to win a playoff game in 5 seasons, was 72 years old and hiring terrible coaches and forcing his sons to be at the top of the coaching staff?
Kraft gave Belichick free reign to the point where he allowed Belichick to drive away the GOAT.
Kraft gave Belichick all authority until Belichick proved he no longer could run an NFL organization which is why no team wants to hire him in the NFL and why he had to go to college.
That doesn't take away from what Belichick accomplished in his prime, but he is no longer the GM/HC he once was. Kraft's mistake was giving Belichick as much time as he did.