I don't know why you keep suggesting I'm focusing on just one or two games in making this claim. Their offense didn't show up against Tulane, Florida, LSU, Ole Miss, and Georgia. Their biggest offensive outputs have been against really shi**y defenses. I get that 2 of their games were against great defenses, but Gus is supposed to be a great offensive mind to counter that. In a couple of their better offensive performances, Oregon and Texas A&M, they didn't bring it for anywhere near 60 minutes. Their offense overall, over the balance of this season, has simply been not very good. It's the difference between them being 8-3 and potentially 11-0. Their defense has played well enough to win every game.
Auburn isn't having to play a true freshman QB at random or because that's the hand they happened to be dealt. Gus is ultimately responsible for the composition and depth of that position group. That sounds like people who tried to absolve Harbaugh of blame for their offensive woes because "he didn't have a QB." He's ultimately responsible for the fact they don't have one, is he not? I think most teams, unless they are in the midst of a rebuild, don't seek out the chance to start a true freshman QB.