I understand why people complain about the pz4. But actually its realistic. It could be destroyed by a 45mm gun let alone a 57 mm one with sabot rounds. The shermans are ok at bouncing 50mm ammo in comparison because of the slope and thickness. Small calibers have a lot of disadvantages when going against the slopes. Shermans also did have stab which improved aiming times. The fireflies didnt have one though.