He didn’t. He led the country in knock downs and was second in the nation with the least amount of time from snap to being hit. Throw in receivers not getting off coverage and it all made JG look bad. It’s easy to be a arm chair qb but YOU get out there and get sacked and knocked down on average 27 times a game and see how you play.
For a good case study, go back and look at UT with Simms at QB and then with Bray. With Simms, the OL was condemned for being swiss cheese... terrible... worst ever. Bray comes in... starts getting the ball off on time... and suddenly the OL doesn't suck so bad.