They only paid a human price because the soviets literally threw people at the problem. We can see the same problem today in the war in Ukraine. They actively either don’t arm, or barely arm soldiers and then expect them to take positions against well armed and trained soldiers. The allies were supplying tanks, small arms and other supplies to the Soviets. Let’s also not wash over the fact that the soviets literally allowed hitler to develop weapons in their territory as long as they benefited from it. They only lost as many troops because their leadership was stupid and ineffective.