Stafford is not a bitch, he was making God-Tier throws that entire game. Xavier Smith's muffed punt that lead to a Seattle TD was the difference in the game. Seattle won by 4 points and that muffed punt was either a 7 point swing or potentially a 14 point swing if the Rams would have gotten a TD on that drive he muffed the punt on.
That also ended being the only turnover in the entire game as well.
That and the Rams defense could not stop Kenneth Walker or JSN to save their lives lol. It's not rocket science, that's literally two dudes.