Babich was over his head. He had a bad 1st year, but not a disaster by any means. He was bad enough to get fired, but given it's his first year I feel this would be premature.
Fault was on Babich. It's his responsibility to coach up players and several guys regressed in 24 .
Douglas, Oliver, Jones, and Bernard all showed some regression to me. A couple players, like Hamlin and Williams improved, but not a ton of overachieving IMO. The D-line needs a massive directional shift.
There was also strong evidence Babich was easy to game plan against and had poor plans to stop opposition offenses.
Bills D chronically had slow starts in 24, often struggling in the 1st half of games, giving up huge chunks of yards.
However- This flaw also displayed a strength; Babich was good adjusting in 2nd half, and apart from a couple games, the D made adjustments needed. This was something to build in and has promise.
The turnovers were another huge plus. Many of them were takeaways, and this too is reason to have optimism. Difficult to count on though.
I'd replace some key players, tweak D line coaching, and make a few other adjustments.
I'm not sure if Babich is needed up in the box. I prefer DCs to be down in the trenches w the men. This may be something I tweak for 25.
I'd give Babich another season and roll on. Criticism is merited though, and despite the fact Bills D is " middle of the road" we consistently get torn apart by top Offenses in the deep playoffs.