No, the fail is by the OP suggesting that the losses under Garrett were so significantly better. Yes, things were different. The team won a few more games. But is losing by a combined 7 pts that much different than the five losses under Wade where they were trying to play and each loss was by 7pts or less?
The offense was more than decent, but the defense was never never championship-level.
After the team gave up, JG did an admirable job righting the ship and getting them to play to their level and be competitive, but it wasn't like it was that much better.
The OL was still inconsistent, the drops by receivers continued, and the defense was still a sieve. It was still the same team under Wade, but they decided to play hard again. What saved them is the number of penalties per game went down.