At some point, you have to figure that a QB is not a starting QB in the NFL. Darnold has had four years to get it together. Even more, franchise QBs, which are coveted even more, come into the league and give evidence that they are franchise QBs notwithstanding bad O-lines and other suboptimal conditions. I would genuinely give your suggestion more credence if it hadn't been Sam's fourth year in the league of doing the same things, some of which he did in college. I'm fairly certain that I remember a stat which indicated that he was at the bottom of NFL ratings even when he had a clean pocket. In my opinion, it's time to move on from the thought that he's anything more than a questionable backup.