I just don’t think Michigan is that good
I am not sure they are that great either, but they can rise up and play well like when they crushed Notre Dame last year 45-14, then look like garbage for weeks at a time. Harbaugh had a physical, tough teams at Stanford, that played a Big Ten style, yet at Michigan they are not even close to that with better talent. They seem to almost never run the ball well, and the defense is OK, but not great.
Harbaugh has not come close to replicating his Stanford model at Michigan. A strong Michigan team is good for the Big Ten image, but I'd like them to hit a Nebraska skid or Gopher dark ages stretch to get some humility back. I still enjoy watching the 2014 game at Michigan on the DVR to see all those pouting, spoiled Michigan fans enduring the spanking the Gophers put on them. Harbaugh has been almost as much of a failure as Brady Hoke.
It must be about continuity with the staff, not having the same chemistry, and with the Big Ten being tougher than the PAC 12 from his days there from top to bottom. Franklin at PSU has passed him up, and he cannot get even close to competing with Ohio State.