Instead of betting underdogs, you should have simply bet on B1G ATS and won....
This is a bit aligned with my notion that "popular perception" in such things is often wrong, e.g., many folks believe the SEC is superior, so perhaps the betting lines shifted in that direction slightly when in fact the B1G teams are better then perceived.
One might have thought having four CFP teams instead of three would hurt B1G bowl performance, but ....