It’s incredibly common for free-agency pickups to crash and burn, but it’s incredibly rare to see a team pay a quarterback $40 million per year and have the signing unravel this fast. This is exactly what happened to Kirk Cousins after signing with the Atlanta Falcons, and he didn't even last one full season as the starter on said deal.
Even Daniel Jones found himself on a longer leash in New York, and even at his current age Cousins is probably twice as productive as “Danny Dimes” ever was. It was bizarre that when trade interest was at its supposed peak, Terry Fontenot opted to keep the Michigan State product to back up Michael Penix Jr in case things go awry.