This makes no sense.
The Packers have had a great offense for many years, so does McCarthy get credit for that? At what point did he go from being really smart to really stupid? Just as recently as 2016 (before Rodgers injuries), that offense was among the best in the NFL.
Mike McCarthy, who was also the playcaller during two MVP seasons from Aaron Rodgers and for all these years while Rodgers has put up a 104 passer rating, just suddenly sucks?
Aaron Rodgers is not good right now, and last year he was injured. Maybe it's injury, maybe it's age, maybe he'll be great again. But right now, Aaron Rodgers is the biggest problem with a team that just wrote an $80M check to ensure he is the highest paid player in the league. The same guy whose done just fine with offensive philosophy just lost it? Wow, what a coincidence, just at the time that Rodgers appears to be missing a ton of passes he usually makes.
And since you think Josh McDaniels is a better playcaller than Mike McCarthy, it's hard to prove either way, but Josh was run out of Denver without a quarterback like Brady and then flailed in St. Louis. Meanwhile the Patriots offense has always been great with Brady under Weis, O'Brien, and McDaniels. The quarterback has so much more to do with the production of the offense, and the playcaller/offensive coordinator is immensely overrated in general. Just look at Joe Flacco, who puts up the same 83.0 passer rating with like eight different offensive coordinators, all brought in because they bring some kind of new look. Or look at Bill O'Brien's supposed offensive success with Brady and Watson compared to the other low life QBs he's had.