Good coaches come and go for sure. It's not the end at all.
But there is glaring sign for Brian Kelly ---- If you are good and know what you are doing, Brian is too controlling. He doesn't let these guys do what got them there. He doesn't let them run their systems, plays or calls. At least on the offensive side of the ball.
It's no different on the field either. He brings in a ton of talent which for the most part he doesn't make use of, and squanders it on the bench.
Brian Kelly did a great job building this program. By the same token he's doing an equally great job tearing it down by being too controlling, a know it all, and too difficult to work with or play for.
Sad.