Memes

1. Katyn is debated, actually. There were Nazi bullet casings that predated any chance for the Soviets to come accross them, children were included in the victims (something the Nazis did regularly and was practically unheard of for the Red Army), and the bodies were stacked in a manner the Nazis were known to do. The origin of this massacre as a Red Army crime? Joseph Goebbels, I kid you not. As for the Polish government, I wouldn't say it "tried its hardest." The results were clear the second the Nazis set foot on Poland, either all of it would go to Nazi Germany or some would go to the Soviets if they got involved.

2. 1946 was a direct result of World War II, surely the year can tell you that alone, right? The Nazis scorched and burned everything they could, 50% of housing was destroyed by their genocidal invasion. Food stabilized as they built back.

3. Fair enough.

As for your closing paragraph, I recommend you read Blackshirts and Reds. The Nazis and the Communists are in no way comparable, and doing so originates with Double Genocide Theory, a form of Nazi Apologia and Holocaust Trivialization. Out of all the major world powers, the Soviets were by far the best and most progressive, and it isn't close. From Nazi Germany inventing industrialized murder and trying to colonize the world, to Britain intentionally starving 4 million Bengalis, to French colonialism of Algeria, Vietnam, and more, to US colonization of Cuba, genocide against Palestinians, Koreans, Iraqis, Vietnamese, and working directly with the Nazis before and after World War 2, and more, the Soviets were consistently the most progressive and most correct.