You don't think that bad coaches post 19-12-esque records? Gott, Pelphry, and Gaudio, among literally hundreds of others, disagree.
You're putting words in my mouth. I neither think PER is unassailable nor think Kenpom is completely irrelevant. That being said, we're sitting at 90 kenpom.
The 10 teams above us? Northwestern (15-17), Temple (16-14), SMU (16-15), Stanford (17-14), Vanderbilt (12-19), Utah Valley (21-9), Belmont (24-9), UNCG (27-7), Buffalo (23-8), and South Carolina (16-15)
The 10 teams below us? Iowa (14-19), Oregon State (15-15), ETSU (25-9), Furman (23-10), Georgetown (15-14), Northern Kentucky (22-9), Northeastern (23-10), Washington (20-11), UCF (18-12), and DePaul (11-19).