Agreed...the Soviets do desire credit for their contributions to beating Germany. Their soldiers fought courageously even though their leadership from Stalin on down to low ranking officers was completely incompetent. Millions died due to this incompetence.
But, let us not lose sight of who the Soviets and Stalin were. They aligned with Hitler in 1939 and conquered half of Poland and the Baltic States after Germany invaded. They also attacked Finland later in 1939. Stalin had visions of enlarging his empire while working happily with the Nazis.
Had Hitler not foolishly invaded the USSR, they would have continued as allies and Stalin would have continued to support the Nazis along with killing all the Jews.
Stalin considered Hitler a friend and ally prior to Barbarossa. And, even after the German invasion, the little pocked marked Mommy's boy murderer from Gori, refused to accept that his buddy Adolph was attacking him...all the while his troops were dying and surrendering in droves.
Additionally, Stalin signed a non-aggression pact with Japan in April 1941. Essentially aligning the USSR with the two major aggressor nations at that time....Germany and Japan. That pact would later allow Stalin to move large numbers of troops west to fight the Germans because the Japs were to busy fighting the Americans.
The ONLY thing admirable about the actions of the USSR in WWII was the bravery of their soldiers who were used by Stalin as cannon fodder. Nothing else is admirable or honorable. They were a scumbag nation just like their dictator.