We can make the Cowboys' postseason struggles all about Dak if we want, but remember he is a symptom of a greater disease.
You can treat the symptom, get rid of Dak. But remember the disease will remain, and the next QB will be fighting this ailment that goes back so far, Dallas didn't even sniff the Super Bowl the last five years of Troy Aikman's career. Then came Quincy Carter, Chad Hutchinson, Drew Henson, Vinny Testaverde, Drew Bledsoe, Tony Romo, and then Dak Prescott.
None of them have overcome. Change the QB as many times as you want, become the new Browns or Commanders. It won't matter until change comes at the TOP.