Carroll was not a good HC for the Pats.
Maybe but he's still a good coach. His NE record (.563) > Bill the last 4 years (.439). Never had a losing season (Bill 3 out of 4). Made playoffs 2 out 3 years (Bill 1 out 4). Better playoff record (1-2) (Bill 0-1).
HCs in their 70s:
(Age) Head Co: Record (Win %) [playoffs]
(72) Marv Levy: 26-22 (.542) [1-2]
(72) George Halas: 21-18 (.538) [0-0]
(72) Pete Carroll: 24-26 (.480) [0-1]
(71) Bill Belichick 12-21 (.364) [0-0]
(73) Romeo Crennel: 4-8 (.333) [0-0]
Totals: 87-95 (.478) [1-3]
Unless we think that Belichick is going to defy the laws of physics, the future doesn't look promising.
Oldest HC to win a SB/Championship:
George Halas: 68 yrs 331 days
Bruce Arians: 68 yrs 127 days (w/GOAT)
Last time HC won a SB:
Belichick was 66 (w/GOAT)
Coughlin was 65
Andy Reid was 64 (still active)
Vermeil was 63
Carroll was 62
Ewbank was 61
Walsh was 57
Most of the other great coaches won in their 40s or 50s.
At some point reality has to set it and people need to realize that the odds of Belichick winning another SB are slim to none. Even bringing the team to a playoff win is a long shot. The NFL is >100 years old and history is not on Bill's side.
It's time to move on.