How often does a coach come into a dumpster fire like Jones did? It's easy to do it if you have upperclassmen with talent that have played and have been coached.
Almost always when a coach has been fired. RichRod and now Hoke have at Michigan. Bielema did. Sumlin did. Freeze probably had it worse than Jones at Ole Miss. Franklin's situation at Vandy was worse.
For that matter, both Kiffin and Dooley inherited "dumpster fires".
Of course that's easy... it just isn't as common as you think. Seldom do coaches get fired when they have a bunch of talented upperclassmen that have been coached well. By and large, coaches get fired because they aren't getting good players or coaching them up.