The argument here is that the German military was 'qualitatively' superior based on tank and infantry casualties alone. (beancounting logic)
The German military was incapable of deep penetrations on a narrow front in 1943-1945. The Panzer Armies, even with local superiority in the initial stages, were incapable of breaking into Soviet operational depths from spring 1943 onward. Unlike in 1942 the Panzer divisions/korps could be stopped with local soviet forces and reserves. An Army that can't attack and only defend: that's called being militarily bankrupt.
They couldnt penetrate the Soviets lines because the Soviets out numbered not because soviets had better training or qualitive superiority. Soviets had a quantitative advantage. Isnt there the rule that you should out number your enemy x4 if you are the attaking side, Germans never were in such a situation, since when they attaked at Kursk or try to counter attak they were outnumbered by the soviets, at some section of the fornt soviets outnumbered them 1:20.