I disagree.
You cannot get much more evil than Stalin.
The defeat of the NAZIs brought the Soviet Union into superpower status. The Soviets inflicted horrors all around the world. Were they better than a NAZI victory would have been? Impossible to say, but they were better for me, as I doubt I would be here if we had not fought WWII.
If Hitler had invaded Britain instead of the Soviet Union, Stalin would have supported Hitler.