Hue Jackson was never really interested in developing Baker Mayfield.
He has never really been into player development, in general. You can tell by the fact that he never bothered to do it. But it really showed with Mayfield. From the day Jackson decided to deny the top overall pick first-string reps in the offseason, it was clear that slowing Mayfield's development was practically Jackson's mission statement.
It was like a Munchausen-by-Proxy approach to running a team: weakening it on purpose to keep expectations low.
Jackson, who was finally fired Monday after amassing a 3-36-1 record as the Browns head coach, did care about winning games, of course, but only in the abstract sense that winning games was the most direct means of accomplishing his real goal: making sure Hue Jackson remained employed.