Thats a simplistic argument, especially for a team with problems everywhere from schematics and game day coaching to recruiting, player development and intangibles like, as fiu said of UM, being “soft”.
There is a basic level competence that a P5 coach should have. Losing to Go5 schools while fielding top 20 talent falls short of that minimum requirement, and speaks to way more than an offensive system or a PK.
If you want to focus on that offense, tho, that’s fine. At the end of the day, diaz allowed that OC to enter games with that gameplan, to run that scheme, and destroy the season.
I know it’s comforting to think that there’s a quick fix to this mess, and I don’t blame you for doing so, but there isn’t. This team needs a number of new coaches, an infusion of talent and a leader to set a different tone for the team.