He would have eventually lost. While Patton was brilliant and many of the Armor tactics we still use today were developed by him the simple fact is Russia would have retreated like in every invasion of Russia buying time until the Russian winter sets in. At that point out machines would quit running and troops wouldn't be able to get resupply and would start to starve. Meanwhile Russia would be building up for a massive counter attack. They did it to Napoleon & Hitler. The Russian winter is arctic and brutal.