Now that picks up right after D-Day, yet the Russians inflicted 4X the deaths of the U.S. and Brits combined.
How many Germans total were in that theatre? Russians? Over what land area? What ocean did the Russians have to cross to get their troops to the battlefield? What fortifications did they face when they fought these obviously dug in and heavily supplied troops? Oh wait, it was the Americans and Brits fighting dug in, supplied troops while the Russians were fighting overextended troops far from supply.
You're providing excellent apples to oranges comparisons.