The biggest is that after the war, the German generals tried to blame Hitler for everything. In fact, the officers generally supported Hitler. He might even have been slightly better at strategy and logistics than they were.
It is not that hard to be better at logistics than a WWII German General, I personally know some stray cats in the area who would do a better job. At least they wouldn't try doing mechanised warfare using mostly horses or plan an amphibious invasion across the Channel using mostly under- or unpowered river barges.
To add, plan an amphibious invasion across the Channel using mostly under- or unpowered river barges, many of which would be used to transport thousands of the aforementioned horses across the sea. That would have been quite a sight.
Even if they managed to land their menagerie, based on their calculations that don't account for the existence of the Royal Navy and Air Force, if they managed to capture Dover (presumablyby overwhelming the defenders with the stench of thousands of drowned horses) and get its harbour up and running, they could have supplied their forces with a whopping 40% of the supplies they would have needed to keep on fighting.