Hundley has had pretty good offensive lines during his career. He's had people like Su'a-Filo, Baca, Benenoch, Brendel, and Redmond, all of whom were/are legitimate NFL prospects. He even had Evans, Fauria, and Franklin, amongst many others to lean on, including the all-purpose prospect, Myles Jack. His happy feet got him sacked more than his entire offensive line did. He was actually worse as a pocket passer in 2014 than he was as a rushing quarterback in 2013, and he refused to change for his teammates, even when they were losing games. He wouldn't run the ball because of what NFL scouts would think (which he admitted himself).
More than half of his passes were six yards or less, he's a horrible passing quarterback on the run, he has zero anticipation (can't lead receivers and often overthrows or lets his passes sail), he has horrible pocket presence, he can't read coverages, he fumbled a ton (eleven fumbles in eleven games), and he took 125 sacks in three years. In college. With talented offensive lineman (the thought that UCLA's line is weak is a bit of a stretch. They're not the best in pass-protection, but I saw the same issues when I was looking at Su'a-Filo blocking his blindside, and Su'a-Filo should've probably been a first round pick and was taken with the first pick in the second round.
And yes, I've watched his games. Not as much as you or DR, but enough to see that he won't be a quarterback at the next level. A running back? Sure. A tight end? Maybe. A quarterback? Not with his numerous issues.