I think Garretts offensive philosophy is based on the Cowboys of the 90's with Aikman. He still thinks that can work. You run the same plays and execute them and you win. The problem is that he does not have Aikman, Irvin, Emmitt and Novacek who just did not make mistakes in those prime years. Irvin was much different than Dez. He was a reliable move the chains WR. Novacek, in his prime was a lot like Witten. Emmitt was Emmitt, workhorse and reliable pass catcher. Aikman was so efficient.
That's Garrets philosophy and he just does not have the players, and he does not have the coaching ability to pull that off. It worked in 2014 and 2016 when we played mistake free perfect football and great Oline play. I don't think he ruins players.