Famine in Poland? You’re referring to the Warsaw Ghetto famine (that was the Nazis) or the shortages in the early 1980s? The GDR sent a lot of stuff over back then.
…frankly speaking looking through lists famines in Poland are historically about as astonishingly rare as plague outbreaks.
My point still stands, though: The Soviets were absolutely willing to do worse, it just wasn’t opportune at the moment. And this isn’t about “What either side did in Poland, specifically”, but whether there’s a point at which evil is so bad that it’s pointless to make distinctions. And the Soviets crossed that line.
You can also find people the Nazis treated way better than Poles, Slavic people: The Sorbs (mostly innocently). Or Croats (because Ustaše). That doesn’t suddenly make the Nazis less evil.