When Garrett took over a 1-7 team, the measure was simply wins. Then when he was 8-8 for three seasons in a row, the criticism was 'he can never get over .500' and that he couldn't ever win the NFCE. Then when he took the team to 12-4, won the East, and won a playoff game it was refreshingly quiet and we didn't get a lot of 'he can't win in the playoffs' because he won his first playoff game and because people basically thought we got jobbed against a good home team. Then at 4-12 it was 'he can't win with any QB other than Tony Romo.' Then at 13-3 playing a rookie third string starter it was 'he can go over .500 consistently, he can win the East, he can win with a backup QB, but he can't advance in the playoffs.' Don't tell me the standard for measuring him hasn't changed since 2010, because I've been here and posting that entire time. I know what the criticism has been.
Yes, coaches who are good enough to coach long enough to have playoff records eventually get judged by playoff success on top of the regular season success required to have that sort of longevity. Yes, that will eventually happen for Garrett if he keeps winning enough regular season games to have a long playoff record. No, 1-2 with two close losses to a comparable team to ours is not an indication that he can't advance in playoff situations.