Patrick Mahomes I think had 1 TD and 3 INTs and a loss against Denver around the same time frame in TWO games.
Just want to remind you when I made a point about sample size re: Mitch Trubisky you lied and screamed 'YOU WANT TO COMPARE TRUBISKY TO MAHOMES!!?/!!!/!!11!" about it for literal years. You still bring it up sometimes. So do you really want to compare Fields to Mahomes? If that sort of thing were the norm for Mahomes instead of the outlier, he'd be viewed very differently. The same goes for Fields, but the game he had against Denver is the outlier, not the norm, to this point.
I'm sure there's some excuse for why it wasn't his fault, but Fields also fumbled (it was returned for a TD), turned it over on downs, and threw a pick in the last seven minutes of that Broncos game. Three times they had the ball with a chance to make a play and seal a win, and three times Fields gave it back to them resulting in 10 points for a 3 point loss.
Denver is 11th worst in the league in passing yards against, and 6th worst in passing TD against. Washington is dead last in both categories.