With all of the data out there, and countless examples of coaches brought up in other threads, it's hard to believe anyone can still have this opinion.
Yes - all of the other P6 coaches hired at the same time as Ben or after, had the same challenges and roster turnover he had. They either lost the majority of their roster to the transfer portal and brought in better players form the portal, or were able to recruit good players on the roster to stay and supplement them with better players from the portal.
Ben did neither in year 1. That's 100% on him and no one else.