https://en.wikipedia.org/wiki/List_of_National_Football_League_head_coaches_with_50_wins
Look at all the coaching records. Study them close. In the modern era there are only a handful of coaches that win well over 50% of their games.
-Take Bill Belichick for example. He had a losing record at Cleveland, was fired, and hired by New England. Did he suddenly find the ability to coach or was there something different.......say perhaps Kraft, Bledsoe, Brady?
-Dungy was very close to a .500 coach at Tampa......then he went to Indy where his record blew up. Why.....did he suddenly find the ability to coach?
-Pete Carroll was let go of the Jets.....didn't do that well with the Patriots.....was on the hot seat at Seattle......then they found Wilson.
-Bill Parcells - is considered one of the better coaches in the NFL, but lifetime of .569.....with a few stops only being .500
-Marv Levy - Losing record with the Chiefs, but then struck gold in Buffalo
-Ditka - awesome with the Bears, but fired from the Saints
-Shanahan - 2 losing records with 2 different teams......but struck gold with the Broncos.......mmmm, perhaps Elway?
-Coughlin - basically a .500 coach at Jax for a long time. Got picked up by the Giants, drafted Eli, and won several SB's.
-Reeves - was awesome with the Broncos but then had 2 losing records with the Giants and Falcons after that.
and on, and on, and on, and on
See, where I'm going with this? Whiz is certainly, certainly not a great coach by any stretch of the imagination, but don't be fooled to think that what we have seen over the last 23 games is only a product of the coaching.
The NFL passes these guys around like candy. Guys get blamed and fired all the time for lack of winning, but often it isn't the coaching that's the issue.