I missed the first half of Saturday's game, so I can't really comment on the match-up conundrum. But I think it's safe to say that Holtmann made an adjustment there. And when you're (IU) getting absolutely nothing from all of your guards, a blowout at the hands of a team likely destined for a #1 seed is inevitable.
As for your second paragraph, the only player drafted during Archie's tenure so far has been Romeo Langford, who played 75 percent of his lone CBB season injured. In totality, the Hoosiers have finished in the conference each season approximately where they were projected to finish. And I've already spelled out the reasoning as to why it hasn't happened as fast for Archie as it has for Holtmann - No disrespect to Holtmann.
And with the Pandemic cancelling last season's tournament (in which IU, by all accounts, had qualified), we'll never know the Hoosiers' season would have played out. Sure, they could've been pummeled in the first round. But it wasn't out of the realm of possibility that both Devonte Green and TJD could've heated up and carried them to the Sweet 16. The '19 team could've also been dangerous with a healthy Langford and Hunter. In both cases, the talk of CAM being over-matched would be a moot point.