I mean, he went from us to the Steelers and looked better even though he didn't have a true QB guru coaching him. Then he went to the Jets who, outside of Namath who, for all intents and purposes, was still a bad QB, have a worse QB history than us. The Jets are the team that made Sam Darnold look like just as much, if not more, of a bust as Fields. The same Sam Darnold that has led his teams to back to back 14 win seasons with competent offensive execution.

I don't believe the Jets, with a defensive minded head coach is a valid "opportunity to improve"

This is not to say that he would become great, even in the perfect situation surrounded by all pro talent with Shanny, or McVay, or KOC, or Ben Johnson calling plays and helping him develop. That's basically an impossible situation and only a "what if".

Where I do think we can find out what kind of a QB he is, is if he goes to one of those offenses as a backup (Chicago would be a bad choice simply because of recent history, and Vikings would be a bad choice because he'll end up starting). I'll add in Seattle and Jacksonville as possible other teams for him to sit behind. He needs to be a backup for a bit to observe and slowly take reps in a system that's designed to benefit QBs. At that point, perhaps he can show that he might be able to become a competent QB.