This notion that Mayfield "sucks" reflects the typical fan reaction- the QB has always gotten way too much credit and way too much blame. There haven't been many great NFL QBs who didn't have at least a good offensive line. Mayfield had arguably the greatest rookie season any QB has ever had- NFL rookie record 27 TDs with only 14 Interceptions (fantastic ratio for a rookie), 63.8 completion pct., 3725 yards, all in only 13 games. He didn't suddenly lose all that talent and potential for something even better. If he had started all season, he would have shattered all NFL rookie records.
The biggest difference between last season and this for Mayfield is his laughable left tackle- all-time bust Greg Robinson. It is absolutely criminal that any organization would entrust their franchise QB's blind side to such a complete flop. The rest of the line is hardly better. You put Mahomes or any other QB behind this line, and see how they do. For one, Mahomes wouldn't be able to throw any of his patented bombs, because Mayfield never has more than 2 seconds or so to throw. No time for deep patterns.
It wasn't just Mayfied who was overrated going into this season. The Browns were. The media acted as if OBJ would be some kind of savior. They also discounted what an OBJ-type personality brings to the locker room. OBJ can't do much if that putrid offensive line doesn't give him enough time to run any kind of decent pass routes. Yes, the play calling has been abysmal. They aren't giving Mayfield any help- screen passes, quick patterns, etc. And someone must be ordering him not to run. Many times, he could have taken off quickly once he sensed the pressure, and mitigated the pass rush. He does look like he bulked up, which is not a good idea for a QB, which may be slowing him down. But even Philip Rivers scrambles more than Mayfield does.
The Browns' defense is also overrated. They looked at least as bad as the offense against the 49ers. I'm scared that if they don't upgrade that line, and change the play calling, Mayfield could become as damaged as another potentially great QB was- David Carr. Mayfield proved, in his rookie season, that he can play at the highest level in this league. His offensive line-especially Robinson-hasn't, and never will. Neither has his coach.