Dak only completed 3 passes of 10+ yards in the air, and two of those could have easily been incomplete. Cooper went way up and snagged an overthrow to convert on 3rd and 9, and the TD to Witten was way behind him. The only on-target throw beyond 10 yards was the long TD to Austin, who was completely uncovered and just standing there.
If Goff hadn't been so bad, and the defense and run game hadn't been so good, that probably would have been another ugly loss. Shows you how tough Dak is, and how luck can play a big role sometimes.