4 games of horrific play thanks to Haley's play calls, and terrible zone blocking. It was the worst display of blocking I have ever seen. No QB is going to be on during that mess (no pass blocking - no running game). The first guy to tell you he could've played BETTER would be Ben himself. But, Ben is a proven playmaker. There's no way to pin this on him at all. That OLINE and defense performance was just plain terrible.
Once the Steelers went to no huddle, got rid of Pouncey, inserted Velasco, put Beachum at LT, etc, things went well. 110 receptions by Brown and 10 TDs by Cotchery would have never happened if changes hadn't been made.