Look at Dak's winning percentage after his 13-3 rookie season and then talk to me how he can win games....oh hell, I will save you the time:
Dak's Career Record 2016-2020 42 Wins 27 Losses .609 Win %
Looks good, right? Okay, now let's look at how Dak has been since his rookie season anomaly:
Dak's Record 2017-2020 29 Wins 24 Losses .547 Win %
So outside of his rookie season, Dak has a barely above average winning record. Is that what you want to commit $35M+/season to give his personal stats have gone up but the wins have gone down.