Seriously?(contrary to the claims there is no indication that the Germans were seriously preparing for war until 1938-39 when it was clear the Allies were preparing for war).
Also keep in mind the Germans advanced MUCH further over far worse infrastructure than the Allies did in 1944 France and had less issues with supply.
Germans advanced over the much better infrastructure in 1940, than what the Allies had to overcome in 1944. Germans also had basically no opposition in France past late May of 1940.
Much of the claims about how bad the Germans were at logistics is post-war propaganda to bolster the image of the Allies, as they really made a ton of mistakes that the generals were very interested in covering up. After all they mostly ignored the ports and then were shocked when they ran out of supplies at the German border. Like how could the vaunted Allies miss how important Antwerp was? Then even after they captured it they didn't allocate enough labor to even fully utilize it. And they ran out of infantry replacements so were using untrained clerks as meatshields by late 1944. During the Bulge the US even had to beg the Brits for 400 Sherman tanks even as thousands of Shermans were waiting in depots in the US to go to Europe.
Allied generals made a mistake.
German politicians made even more serious mistakes, only to find themselves in hot water when the whole enterprise of conquering the world bit them in the hides. Part of the mistakes was that Germany have had no logistical tail big enough to cater for grand plans tailored up.