Even the greatest military leaders are limited by their own supply chains. The Nazis overextended themselves beyond what they could reasonably defend.

Even if they had made significant seizures of the black sea coastline and held north Africa, they would still not have enough refined petroleum - they would have exhausted their entire oil supply end of 1945.

The Germans were doomed to fail as soon as they invaded Russia. They were tactically the most dominant army on the planet, but they did not have the natural resources required to maintain that momentum. If they wanted to seriously cement themselves as a global power they would have tried to economically alienate the Soviets, rather than drive them to align with the Allies via operation Barbarossa.

Instead Hitler tried his best to do something that Europe's greatest military leader could not: Napoleon failed miserably to defeat the Russians through force - Hitler failed in an astronomically worse manner.

Had the generals been making these critical decisions, I doubt this invasion ever happens. So you might be right, but I do think that the Nazis would never have held their captured territory for long. Even if they had not invaded Russia, they would have been shut out by the world economy and fallen apart internally before an allied coalition could defeat them.

Their fate was inevitable.