Now compare how their respective OLs stack up. Browns have a pretty good OL overall. The Broncos? Best I can say is that it's fixing a damaged plane midflight. Getting better, but not good enough yet.
PM has been a trooper, but you can tell everything is rushed. Single reads, bad decisions, slop throws, etc.
Not trying to make excuses for his decline, but it's a mix of new system, OL woes, no running game, and PM regressing.
I'm not going to make a complete judgement on him until the other pieces come together. If they ever do.