I don't know where to find those stats but if you do I'd be happy to see them (of course, we'd need to compare year to year and also look at the concepts, the personnel, etc.) This is the closest I can find, which shows improvement in success across the board in passing concepts, especially if you look at the first half of the season:
But I can link in depth breakdowns like
this one that definitively show Dylan isn't particularly to blame.
Or
this one that concludes that the line is the biggeset culprit and Dylan didn't really have a chance on 80%+ of the sacks he took.
Or
this huge one which shows all sorts of things such as:
• Our offense got drastically worth with Dylan out
• Dylan running RPO was one of the biggest strengths of the offense and the best we'd been in some time
• Our plays with more protection/pass blockers were pretty disastrous
• "I graded Raiola’s accuracy and timing a little worse this season but his decision making much better — that’s been, I think, well established in other data I charted this year, too. I thought he operated with much sharper decisions, and, in quick game in particular, got the ball to the correct receiver fast on most plays. He obviously had some ugly reps of holding the ball too long at various points in the season, but those were largely a handful of dropbacks in each game and came on deeper passing concepts where he was attempting to make a big play. I thought — and the data says — he displayed much-improved ability to get rid of the ball on most of his plays, with a few lapses per game."
Or you could watch the Michigan game and see how despite having multiple players closing in on him
immediately he was still evading insane pressure and making plays, or watch the USC game and see how he was quick and decisive with the ball as long as he had a mediocre amount of time and someone actually open.