Perhaps but the things Dak has a problem with is something I didn't see with Romo back in 2008. Throwing the ball down field and accuracy wasn't a problem for Romo. I think he got injured and missed a couple games that year too. That said, yes, the main problem as it pertains to coaching is Jason Garrett. He had me concerned in late 2007 when teams started to defend his offense better. Starting in December 2007. But in 2008, he lost me completely when the Ravens called him out. Several teams since then have made similar comments about JG's offense.
Now we now the ultimate problem is Skeletor up in the press box. You can blame everyone you'd like, but hire coaches that are qualified to coach your team. Get the personnel that fits your team.