Nonsense.
German equipment at the beginning of WWII was trash. It was trash because it had to be assembled and prepared under the eye of a world still unimpressed with what it had been doing in WWI (and it lost at).
German start of the war tanks were terrible, their infantry armament was mediocre, and their infantry no better trained than the rest of the world.
Have to disagree with some of this. Germany's early equipment had many of the issues you state and by 1945 I agree that much of the elite infantry was dead but at the start of the war they had a significant training advantage over nearly everyone. The army had developed its new tank doctrines by training hidden in the depths of Russia since the early 30's (thanks Stalin old pal!), and then practised these in Spain along with its new doctrines of close air support with stuka divebombing. One general captured in North Africa bemoaned that he had only managed 21 tank engagements in Africa compared to over 300 in Spain. Before it turned West its troops had taken Czechoslovakia and then fought the theoretically formidable Polish. Good leadership and tactics were the key but these need trained troops to execute. All German youth had by this point several years (military) training in the Hitler Youth. Behind all this was the fact that Germans were simply excellent material for soldiers, disciplined, educated, technically minded and frequently ideologically driven.
Compare this to Britain which, whilst it had the experienced (from WW1) but small BEF was also very badly hampered in equipment and training. In the mid-thirties the British were still carrying out maneuvers with flags to represent tanks and AT guns. One corporal was reprimanded for placing his AT gun (flag) in a tree but was able to protest that he had never seen an AT gun but didn't know. The Russians had as we know shot many of the experienced officers and were still in the process of responding to their Finnish debacle when the Germans invaded.
Were the Germans uber-engineering Wizards? I give you the magnetic mine, the 88mm, the MG42, the Fritz-X homing missile, the ME262 and of course the V1 and V2.