... I don't disagree ... L-L, especially US LL, aircraft were a godsend for the Soviets ... robust and well designed and equipped, but L-L armour was, IMHO, a different story. Truth of the matter, on the Eastern Front where distances were so great and Soviet reserves so vast ... tanks, any tanks, were a welcome support for both sides. There were Matildas at the Battle of Moscow in December, 1941 and there were Churchills at Kursk in July, 1943. The Soviets were glad for both ... but they knew what British crews also knew ... that neither tank was a match for well-deployed, motivated German armor.
So I regard all Soviet dissing as just propaganda ... and with all due respect, the T-34 was widely respected and deployed by the Germans ... and inspired a T-34 killer, the Panther.
So ... when the Soviets 'got it right' ... they got it right.