Huh? How did the USSR have infinite resources? They were barely kept afloat by western allied help (especially at the beginning). Remember also how Tsarist Russia was the first power to collapse and get knocked out of the war in WW1, long before the war was over. They did worse than even the proverbial 'Sick Man of Europe', the Ottoman Empire.
Not saying that the Nazi strategy was without flaws, of course. But your specific critique is a bit too blunt.
they had more soldiers to throw into the meat grinder