Nobody has ever successfully defended Garrett. His supporters attack those critical of Garrett by:
A. Asserting that bad coaching is in effect, unprovable.
B. They blame the players and “execution” even though the roster has turned over 2 or 3 times during his tenure.
C. The Defense is the culprit, as if a good HC would have no role in addressing the failures of half of his team over the better part of a decade.
D. Jerry is to blame, but his long tenured and highly enriched coach has no culpability.
E. You can’t judge a coach by his playoff performances (one of my favorites). This same person suggested that Garrett was victimized by the vagaries of turnovers in the playoffs, as if a coach had no responsibility for that highly practiced element of the game. Moreover, the Cowboys have a positive turnover ratio in the playoffs under Jason.
The newest iteration of indirect support for Jason can be found in the “Jason isn’t leaving so detractors might as well find other teams to root for” trope.