I don't absolve Dak of blame, but he can't be expected to carry the offense.
the offense is one dimensional. It's Dak and the passing game. That gives defenses an advantage.
If the pass rush gets there... great. If not, it's OK because they're dropping enough guys into coverage to force Dak to have to hold the ball longer.
Defenses aren't worrying about defending the run because... what run. Play action isn't going to scare a defense.
Dak needs to make better decisions and understand that yeah, it is all on him. His WRs aren't going to give him much separation, so he needs to work harder on understanding when he can and can't risk a throw.
...then there's the OL
Martin is struggling. Steele is Steele. Frankly, Guyton at RT might make more sense right now but they need help all over.