This is what happens when you don't have a Defense and are pressuring too much.
Look how far the Seahawks' defense has fallen. When Russell knows that he basically has to score over 25 points to win any game, puts a lot of pressure on him.
Think about how bad the Rams offense looked in past years when the Defense couldn't get off the field. Then when the offense got a 3 and out... how much Goff pressed after that.. .making more bad reads?
Any QB.. with the exception of maybe Favre, cannot operate well if they had a defense that was at the bottom of the league.