I think that whole team was snakebit in that Oregon game. I'd compare Matt Scott vs. Oregon to Russell Wilson vs. @Rams or @49ers. Wilson played well those games, but was snakebit by fluke INTs against the rams and snakebit by drops vs. the 49ers. A lot of people came down hard on Wilson during those games, I thought he played well and was just extremely unlucky. I thought he'd be just fine.
That whole Oregon game (from Arizona's POV) felt a lot like Seattle vs. Atlanta in the first half. They were moving the football and looked like the better team, but they seemed to be cursed and somehow fell behind big. In the case of Arizona, that snowballed into frustration and an ugly shutout. In the case of Seattle, it resulted in a massive 2nd half correction. Matt Scott is no Russell Wilson, but what Wilson did overcoming adversity in that Atlanta game was extremely rare, the kind of thing you usually only see from the Peyton Mannings and Tom Bradys of the world.
If I had to make a case against Matt Scott, I'd probably showcase his final game against Nevada. It was almost the exact opposite of the Oregon game- Scott played poorly for the most part, but his team still scored 49 points. He had a couple of ugly picks and probably a dozen terrible throws, but he came through when it mattered. I washed my hands of the Oregon game. It was on the road against a vastly superior team and everything about the first half especially screamed "fluke". I think the Nevada game worried me a lot more, but it also highlights that a struggling Matt Scott can still be a dangerous QB.
Matt Scott's best game (on youtube) was Stanford. He was outstanding in that game.