@GoodBoyUV @didymus @NailBomb The fatal flaw of Barbarossa was a lack of unified strategic planning. Officers were given objectives across a wide front without a single driving strategy. Hitler had the correct idea of a campaign against Russia. His generals, for the most part, despite great tactical experience, did not. Hitler understood the need to destroy the Russian army quickly, secure the oil resources of south Russia and the Caucuses, and deny the ability of Russia and her allies to form a new army.

There are other strategic problems, such as the German diplomatic failure on almost every front. Germany failed to get Finland to commit enough forces to take Leningrad, in part due to the poor performance of the forces in Murmansk (again, due to poor German intelligence). Germany failed to rely more heavily on their Balkan allies and Italy, which would prove to be disastrous at Stalingrad. Operation Typhoon's first phase was a great success, but German overambition again proved to be fatal. This is more hindsight, although I would argue that this operation did little but delay the more important southern push.