You say this but it's absolutely untrue. If Dak were a free agent today, he'd get all that's he's asking for and more. We don't realize how bad it can be cause we've been relatively sorted for a decade plus at QB, but when you're a team playing the likes of Derek Carr, Desmond Ridder, Mac Jones, Josh Dobbs, Tommy DeVito--getting Dak would be like the second coming. A team just paid Kirk Cousins a crap ton of money! If you don't have QB solved, you don't stand a chance in the league, and Dak solves that for most NFL team.
I agree his time is done here, and I understand why you think he's just a bum, but be realistic.