Just a bizarre decision by the Visqueens.
I'll have to disagree. Let's separate these two things that also seem to be intertwined because they happened in different seasons.
Heading into 2024
Kirk Cousins was to become a free agent and wanted top dollar and a long contract. He got it all from Atlanta. The Vikings already had a $140M player in Justin Jefferson, a 1st round QB pick ready to go, and frankly didn't see anything in Cousins but a good veteran QB flourishing in KOC's offense. As Packers fans, we all know that Cousins was not a SB quarterback so let's not make him out to be better than he was. He was in the perfect system for his talents. They let Cousins walk for crazy money ($180M) and the length that he wanted. So the Vikings got veteran Sam Darnold to be the backup to McCarthy. McCarthy got hurt and Darnold flourished much like Cousins did in KOC's offense. More proof that KOC runs a good show.
Heading into 2025
The Vikings had the option to pay Darnold, Jones, or Rodgers big dollars to be their QB - or go with McCarthy. Bonus, if they didn't splurge on QB they could address huge issues on the OL. It's not crazy that went with McCarthy and then signed Kelly (C) and Fries (RG) to help fix an OL that has been pretty bad for many seasons.
I don't think their reasoning was flawed. Every veteran has flourished in KOC's system, so they figured have another veteran backup in Wentz was a solid option to McCarthy. Not only did McCarthy get hurt again, but their OL has been decimated. It all looks bad, but they were trying to build for the long term. That's not bizarre IMO - that's how you build strong programs.
The teams paying big for 1yr QB rentals are usually the ones in trouble.