Winston never got better at anything. He was the same QB game 1 as a rookie (first pass a pick 6), as he was as a veteran whose last pass for the Bucs was also a pick 6.
He just never improved any of his abilities beyond what they are, and his weaknesses became glaring and cost the team game after game after game after game after game, etc.
Henry might have reduced his turnovers a little, but Henry mught have fizzled with the run blocking being sub par, and Winston not scaring defenses enough to stray from zero coverage.
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