All fair points (though I'd say his resume at past stops shouldn't matter in evaluating him at this level. He's not being judged on what he did at NDSU 10-15 years ago).
I don't think Miles is a bad coach and there was absolutely a time where I was intrigued by him ending up here. That being said, I see nothing from him at Nebraska so far to be overly impressed with. Sure, are there obstacles to success there? Absolutely. Nebraska isn't a destination job in the CBB world. We absolutely have more in-state talent, I'll grant that, no disagreement there.
It's not just us, there are fans from other schools too all in on the "Miles is one of the best coaches in the conference" narrative. Let's see the results. He's barely over .500 in his 7th season there. Eventually it's he just isn't cut out for that level and in fact isn't one of the best coaches in the conference.