I think that if an US tankman from that period would read this, he would kick your a.... until Berlin and back. Do you think they didn't prefer to have better tanks in order to keep pace with german armor? Don't you think that this did matter for them? Do you think the US generals and leaders enjoyed seeing burned boddies emerging from twisted carcases of their tanks? Of course they didn't.
But german technology was superior. And they just couldn't keep pace with it. So the only way to beat it was through numbers. The best tactics. Same in the case of soviets.
Uh not really, it was a combination of US Tank Doctrine and the US Army's stubbornness. When the M4 Sherman was designed, it was superior to German Tanks at the time, it was better armoured, armed, more agile, and had a stabilization system that allowed accurate firing on the move, an uncommon feature for its time. When it was introduced in Africa, its opponents were the Panzer III with 37mm and 50mm guns, and Panzer IV with its stubby low velocity 75mm Gun. The Army decided the M4 was sufficient and no serious effort was put toward further development.
As the war progressed, the Army's stubbornness slowed any advancement in US Tank design, they only wanted the M4A3 with it's 75mm Guns, which were to be used for Infantry Support. Dedicated Tank Destroyers were kept for AT duties instead. Tanks decided where and when to attack, and for enemy Tanks, Tank Destroyers and other AT Weapons (AT Guns, Bazookas, Artillery, Aircraft, and Mines) were meant to deal with them. The M4 was still considered sufficient, and wasn't used to engage in unnecessary tank combat.
When the US Army invaded France, they expected to be facing down Panzer IV's and light vehicles, Panthers were assumed to be as rare as Tigers. When we ended up fighting large numbers of Panthers and stronger-than-anticipated Panzer IV's, 76mm Guns started appearing on some of our tanks. The Ardennes Counteroffensive was a wake-up call for the Army, it showed massive flaws in our doctrine, which lead to huge gains by the Germans. Many of our Anti-Tank emplacements were flanked and destroyed, our Tanks had difficulty holding back the blitz, we didn't have enough Tank Destroyers on-hand, and our aircraftwere grounded by bad weather.
After this, the Army finally caved and made the 76mm Gun standard on all front-line M4's, as well as deploying our first and only used Heavy Tank in history, the M26 Pershing. Fun Fact: After the war the Pershing was reclassified as a Medium Tank, and the concept was eventually developed into the Patton series of Main Battle Tanks.
That's all for today, tune for our next history lesson in US Army stubbornness: the M14 "Universal" Rifle and the M16 Assault Rifle.