The 1990 Browns won 3 games.

Belichick took over in 1991 in the ensuing seasons the browns won
6, 7, 7, 11 games so steady improvement

In 1995, the last season before the move the browns won 5 games.
They were 4-4 or 4-5 when Modell announced the move mid-season and the team pretty much quit at that point

Stefanski took over a 6 win team.

He won 11 - which I think was contributed to by the covid lockdown. He was able to take advantage of the online stuff much better than the other coaches. Then once the NFL went back to a more traditional training camp...The browns won 8 games last year and are 3-6 so far this season. Looking like a downward trend.