The Germans did have the best tanks, they just took too long to produce and used up too many resources. In one six hour engagement a Tiger tank was hit 227 times and despite damage to it's tracks, transmission and wheels it managed to drive another 40 miles to safety. But, only 1500 were produced. The Germans chose quality over quantity. World War 2 was a war of production, we won the war of production. Unfortunately, Robert McNamara who was an analyst in the office of statistical control in World War 2 didn't realize that all wars are not the same later in Vietnam.
I get a kick out of non-sequiters. Yes, WW II was a war of production, or more accurately, a war of attrition. So a tank that dooms production it the "best"? Ferdi Porsche was the best friend the Allies had.
McNamara came to understand in his last years what a total fuck-up he was, but I still find Americans from the era who never have understood that we jumped into a civil war, and we jumped in on the wrong side. Eisenhower had done the math ten years before and decided to stay out. Even MacArthur, who was no great strategist, had advised Kennedy to stay out. It wasn't like McNamara didn't have people, including his own children, telling him how he was fucking up.
I have to give McNamara credit for reflection, though. I haven't seen the documentary that the same producer did with Don Rumsfeld, but I gather that Rumsfeld is too stupid or too obtuse to begin to understand how badly he fucked up.
War is a place where it is very easy to fuck up with horrible consequences, which is why it should be avoided, especially by imperial powers.