Marshall as a 5th year senior had a lower passing rating than Hurts as a true sophomore. I think that about sums it up.
Secondly, to a point made by another poster, having better passing abilities and being a better passer are two different things. Sam Darnold was a turnover machine and blew his team's chances of a title. He is a great talent, but he screwed up, and those screw up makes their way into the stats. Same with Rosen, for instance he completely blew the Arizona game. That counts, and there is I think the blind spot some posters here have. It's not about what you can do, it's about what you actually do. If Hurts had a 0/3 game and Alabama lost, everyone here would be quick to say he's not a real quarterback. Rosen does that and he's still a real quarterback right?
The simple fact of the matter is Hurts is a good college quarterback, period. The fact that some people here won't give him that simple respect is both mind boggling and obviously born of some deep seeded bias. He has issues, very real, very important, potentially destructive issues. But that doesn't make him unable to play the position and if you can't start with admitting some basic truths about the abilities he does have, you're not going to have a very productive or objective discussion.
QBR is likely the worst possible statistic to use to discuss what the issue is with Jalen.
Why?
It does absolutely nothing to take into account a called pass play where the QB takes off after a single read or does not progress through his reads. In fact, it would reward that behavior. If Jalen makes one read and takes off, even though the second receiver is WIDE OPEN just as soon as Jalen bolts, it has no impact on his QBR. In fact, a QB taking a loss on a sack is more beneficial to a high QBR rating than getting outside the pocket and throwing the ball away. Now, which would be a better football play? The play against AU where he ran out of bounds instead of throwing the ball away - that HELPED his QBR. Was that a good play?
Even you have admitted there are components of Jalens game that have not developed as well as they need to. Quote "He has issues, very real, very important, potentially destructive issues." No one is saying he doesn't have some very good skills. The challenge is that right now, the issues, as you mentioned, are very visible, and very, very easily exploited by above average defenses. They can essentially bait him into a bad play by playing press coverage on ridley, pushing hard on the right side of our OL so jalen won't get past his first read, and having the rest of the DL soft rush to contain with an LB shadow. I for one, hope like mad he can get the issues fixed. He's an amazing athlete, and by all accounts an outstanding representative of the university and a smart, hard worker. That said, fi for whatever reason he can't/won't/doesn't get the issues fixed, he'll be a decent QB with a ceiling that will prevent the team from reaching it's maximum potential and overall goals.
As others have said, this thing with accusations of bias is getting tiresome. You admittedly know the issues are there just like everyone else. There's really nothing more to it than that.