I agree with largely all of this. The QB himself is 90% personally responsible for their own development and success.
the old “how would Brady and Peyton have done if they were drafted in the opposite situations” question was easy to answer. Both may have had a slightly different number of Super Bowls, but both would have still been all time QBs
Darnold is about to go back to being a backup after spending 2 seasons with two of the best offensive minds in the NFL who couldn’t hide his flaws forever.
Sam Darnold was never going to be good. Seems like a nice kid so it sucks, but that’s the way it goes.