Here's you problem, you are scouting stats not film. With a better supporting cast last year he beat BYU throwing 3 TD and no picks. You say you understand he has no talent around him but still expect him to put up good stat lines.... How when his receivers don't get separation and the o-line couldn't stop a middle aged man from getting to a buffet... I really suggest you watch more film and you will see a guy running for his life play in play out and none of his receivers can get seperated. It's not an instance of he cant see or throw open a guy, they just aren't getting open so its either throw up a 50/50 ball or take a sack.
3,208 yards 65.8 comp% 28 TD 5 INT these where his numbers in 2018 and only receiving 8 sacks.
3,085 yards 60.6 comp% 17TD 16 INT while literally doubling the sacks.
His 2017 season was very consistent with is 2018. So you're down playing his lack of playmakers and losing his head coach significantly.