1. 59-20...anyone counting 2020 is a fool. That equates to roughly 9-3 every season which is where Michigan was/has been for its eternity.
2. Bowl games, outside of the NY6 are largely overrated when it comes to assessing a coach or program for obvious reasons.
3. The records against OSU and MSU are what they are and it is difficult to defend them though neither program is chopped liver and the argument could be made that both are at an all-time high point in their programs' history. NO PROGRAM has more "rivals" in America than Michigan (Minnesota, OSU, MSU, Notre Dame) so they will always get everyone's best shot.
4. Your argument about a QB is also hard to dispute but that's not what you said. You said he can't develop talent. There are plenty of other positions on the field and if I am not mistaken, only LSU, Alabama and Ohio State have more draft picks than Michigan since Harbaugh took over. (You may have to fact check me on that one as I don't have time as Notre Dame, Clemson and Georgia are also close, but UM is easily top 7 at worst.)
I told you in my manifesto above why Harbaugh is entertaining his NFL options and why a guy who was supposedly washed up and on the chopping block 365 days ago is suddenly a hot name again. Its funny how that works.