The Rams going zone was fine, provided Aaron Donald could have the usual effect. Going man was fine, provided Aaron Donald could have his usual effect. Instead he was a shell of himself and the Rams got practically no pressure. The Rams DL without Donald is pretty good, but probably not even top 10. Donald doesn't just get a ton of pressure by himself, he does it against double teams and gives everyone else a 1v1. Once Donald proved to be ineffective (in a 1v1 mind you) it had a cascade effect and everything else fell apart from there. Donald may be the best defensive player of all time I'd probably argue that at this point, but I wouldn't pound the table to say I'm right. What I will pound the table on is that he's the most IMPACTFUL defensive player of all time. The pure impact he has on the game is bigger than any other non-QB. Ever. This is due to the position he plays and the skill set he excels at to a far degree.
He's only ever missed 2 games in his career One was against a horrible Colts team on the first game of the season,which you can kind of throw out as it is a horrible data point for various reasons. The other was a week 17 game where he was sat along with a number of other players. We've never had to see this team without Donald or with him being completely ineffective. But from what I've seen of his team from the difference he makes when in the game vs out he is bigger than most people realize to their success.
Once he proved that he may as well not even be in the game cause he literally had a negative impact on it, everything was going to fall apart no matter what they did. No pressure got home. They don't have the horses to go man to man across the board, and Rodgers had over 4 seconds in a clean pocket more often than not. Once that happens it doesn't matter if you play zone or man. A top tier QB will pick you apart.