Most of those fouls were bogus calls. 1 guy gets called for helmet to helmet when his helmet hit the targets back, 1 guy gets called for ripping somebody out of the pile (who knew that was against the rules) and he never went into the pile, another got hit for roughing the passer for so little contact that even the ex-QB doing color for CBS said the rules are getting stupid. These calls were worse than during the Bengals game (pass interference when the defender never touched the receiver before the ball hit the ground, and roughing the passer for being pushed into the QB by an o-lineman).
But the Steelers won anyway, so nobody will pay attention, and the myth that no bad calls go against the Steelers will continue.