I will say this so far about the Broncos. I knew that Teddy B wasn't going to help the Broncos win many games single handedly last year but he wasn't the only problem with Denver either. Wilson is still trying to settle in but the problem with Denver is that their OL is pretty ordinary despite investing a lot of draft resources. The defense isn't what it used to be and a lot of inexperienced coaches on Denver's sideline.
A lot of times teams fall into the trap of thinking they are a QB away from competing when they need to build at team up. Carolina is a good example as they sit 0-2 in a division that looks tougher now.
The Panthers play the Saints, Cardinals, 49ers, Rams, Bucs and Falcons. By the end of Oct they will be lucky to have 2-3 wins going through that gauntlet. Overpaying for Darnold and Mayfield isn't a good idea IMO but it is a long season so they have a slim chance of turning it around.