All true about the TBolt and the Tiger. I only recently learned that the operational life expectancy of a T-34 was less than 24 hours (!), after that time of operation it would break down
with something even without any enemy encounter! But the Soviet Union didn't repair, it replaced, and rather than keeping sophisticated tank repair teams in the field, they geared up mass production of T-34s unbelievably efficiently. Raw materials
weren't the problem and the factories in the Ural were well beyond anything the Luftwaffe with its close range "flying artillery" concept could ever reach.
Raw materials
were, however, a huge problem for the Third Reich - even before the war. That arms spending spree after Hitler came to power rendered the Reichsmark not convertible on international markets, sanctions did the rest. Getting raw materials was a huge issue, Germany doesn't really have a lot of them. So everything had to be repairable - call it fascist sustainability!
And bombs had to hit their target, there were not enough explosive components to go round to ever allow Germany high altitude carpet bombing as a long term strategic option, hence the obsession with dive bombers who could deliver a bomb on target with great precision and therefore not waste bombs. And its legendary technological innovation was in essence forced upon the Reich because of its prevailing shortage economy. All that couldn't prevent the quality of basic components such as armored steel steadily decreasing during the war. The
Königstiger might have been an impressive monster, but its steel was already crap due to manifold wartime shortage constraints and the Reich's sphere of influence diminishing everywhere by the day.
Strafing with a Mustang and its huge, well-engineered, yet damage prone cooling scoop "belly" with crucial entrails such as oil cooler and radiator etc was asking for a stray bullet to do mortal damage to that otherwise fine plane. It's why German fighters always tried to creep underneath a P-51 from behind to deal it the death blow.