Nope, Tomlin/Roethlisberger have had great talent to work with (Hines Ward, Le'Veon Bell, Saontonio Holmes, Antonio Brown). Not to mention some greats on defense.
Rodgers/McCarthy has really been more on Rodgers but even he has had talent to work with (Randall Cobb, Jordy Nelson, Clay Matthews on defense).
Meanwhile Peyton/Brees have won a Superbowl with basically mediocre talent at best and have had a number of good years with really only Jimmy Graham as an actual threat. Otherwise, no great WRs, mediocre at best RBs, and a defense that has been descent to sometimes lousy. They've been down a few years recently, I'll give you that, but the Steelers had some down years as well here and there.