But that's the point. Dak wasn't playing well. You're just spending time on useless garbage time stats that mean nothing.
Against good teams once November arrives and the real season starts, Dak is dreadful. He's lost and overmatched, and he loses games almost single-handedly with his unwillingness to take tough throws. He's the bus driver of all bus drivers. If the receiver isn't wide open, he holds it and holds it until the pocket collapses around him. And now, he doesn't run well anymore either, so he's a sitting duck.
Opposing teams design their entire scheme against Dallas to put the ball in Dak's hands. They have no fear of him because he's ridiculously easy to defend for good defenses, who toy with him. They drop into zone coverages, put a spy on the running back, and dare Dak to throw it, which he can't do.
Dak was at his best his rookie season, and it's been downhill from there. He's 29 in his 7th season. This is what he is.