Baker Mayfield is a lightning rod for praise and criticism because of how outspoken he is off the field and how loud his playing style is on it. When the Tampa Bay Buccaneers are steamrolling folks and winning game after game while lighting up the scoreboard with points, Mayfield is bound to get overpraised as the second coming.
But when the Bucs are sliding a bit and not winning the big games, it's all going to fall on the loudest and most visible man in the room, and even by the standard of most quarterbacks getting overpraised and overcriticized in the NFL, Mayfield tends to bear the brunt of the critics a lot more easily.