Since he was hired as QB coach in December of 2017, he's had three very successful development stories at QB. Zach Wilson, Jaren Hall, and Baylor Romney. I give him credit for each of those, and acknowledge that those three guys have made the majority of BYU's QB starts since ARod was hired.
The problem is the lack of quality additions since 2018, which was the first year on the roster for each of the guys I previously mentioned. Jacob Conover was a very big add, and while he didn't end up being good, I give ARod credit for signing a pretty highly-rated QB. But who is the second biggest QB addition from 2019-2024? The answer is almost certainly Slovis, and while he also didn't live up to our hopes, he wasn't a bad addition at the time (although his stock was obviously down from his peak). After those two it is pretty bleak. There are a lot of guys (Hillstead, Retzlaff, Sol-Jay, Burton, Lugo) that as stand-alone additions, are fine. You aren't signing a four star QB every single signing class. But the amount of recruiting classes without a big addition are really starting to stack up, and that's how the QB future at BYU has gotten as bleak as it is today.
I wouldn't consider myself a big ARod supporter, but I can't remember ever getting to the point where I've though he should be fired. But I think his days as the BYU OC are numbered, and it is more about his struggles recruiting/developing a QB than it is any other aspect of his OC duties.