Fair enough but what is he good at as HC? It can't be timeouts, challenge flags, personnel evaluation or player development
For me it comes down to for whatever reason he seems really able to keep the locker room together and keep them focused. Coming back from 0-3 to a 9 game winning streak is impressive no matter who you are. Also throughout his entire time in the NFL, as whatever role, very few players have had negative things to say about him. Hell more people have said negative about BB than they have BoB.
Time outs and challenge flags are hard to judge. We sit in hindsight or even on the side lines and say "he should/shouldn't have done that" but the world looks much different when you are actually the one that has to make the call and have to make it with very little time to think about it. Could he be better at it, of course and there are some that make you just face palm but there are also many that turned out to be mistakes later but in the moment would have made sense.
Personnel evaluation I agree with you. Anyone that thinks Devlin should still be coaching our line at this point is blind and I wouldn't trust BoB to pick the QB for a peewee football team. I would much happier if we had a Draft Day "You coach the team I give you" type of GM instead of GMs that are trying to get the guys BoB wants.
My biggest argument about keeping BoB right now actually has nothing to do with him. Its that I haven't heard of any proven alternatives that are realistic. We could find another HC but could we find another that would be an actual upgrade or would be go from the frying pan to the fire. Is it worth wasting 2-3 years of Watson and Hopkins careers and most likely all that's left of Watt's career to replace him? This year to me will answer that question.