[B.T.]

I normally do not qoute myself, but this is the exception from the rule. I posted this on the "In defence of the Red Army":
"One should not forget, that the German society was in a constant state of paranoia. Even in the developement of weapons, several agencies tried, to convince all others, that their approach would be the best. And that led to a situaton, where different groups worked on the development of certain items, but a central "power" was lacking. Look at the development of a modern infantry rifle, as an example: Fallschirmjägergewehr and Sturmgewehr both were interesting designs, both were really influential. But in the end, a lot of labour and intellectual manpower were wasted. Because everyone tried his thing, ignoring the work of others. (As an aside: This seems to be repeated in the current US: SOCOM, Marines and Army all search for a specific new rifle. But every force uses a different approach. Or look at the developement of helmets: Marines and Army both replaced the PASGT helmet, but both forces developed their own design!)
The majority of the German units in WWII were still equipped with an old rifle (Kar 98), even in the end of the war. And most soldiers did not ride in fancy halftracks, they moved on foot."

There are some more facts, that have to be kept in mind:
The war economy of Germany was concentrated on building the more expensive and important planes, tanks, etc.
But Germany does not have that many natural resources, as several other countries have. The quality of very basic items got worse, during the war. Everything had to be spared. Germany had not enough leather or textiles. The late war uniforms were made of recycled materials, that were of inferior quality. The boots (and later on shoes) got worse. And production of a lot of other things could not catch up with the losses.
And: When the war began, the German forces had been trained for the war. Although the Reichswehr of the Weimar Republic should have been a small force, Germany violated the Versailles treaty on numerous occasions. Compared to the allies, the Germans were ready for that war.
Take a look at several other states: The U.S. had been in their "Isolationism"-period with a very small Army. The Soviets had just slaughtered the bulk of their professional officers in the 30ies. I'm not sure about the situation in the UK, but IIRC, the British forces had to be build up from scratch, after the Dunkirk desaster.
Yes, in several aspects or trades, the Germans were "superior", but the best airplane, rifle or tank, does not work, if you do not have the resources, to produce fuel or ammunitions for the technically advanced items. All in all, the German military lost some kind of advantage, the longer the war lasted. And those few fancy "Wunderwaffen" or high-tech gimmicks were just that: gimmicks, that could not change the course of the war.