Memes

you can’t just state a country and claim it was Imperialized

Polish communists were very much internationalists (for example Róża Luksemburg who even get a split with Lenin over the point of not wanting Polish independence), but Polish left was divided as every other European left between communists and various opportunists. Also communists got more or less slaughtered during the 1905 revolution, so opportunists immediately gained advantage and in 1914 same thing as everywhere happened, socialchauvinists from PPS tried to gain independence by piggybacking partition powers (mostly Austria-Hungary). By the end of the WW1 majority of surviving Polish communists ended up participating in either Russian or German revolutions, so in interwar Poland not many of them were left. Remnants and new generation got opressed by all bourgeoisie interwar governments from the socialchauvinists through the nationalists to fascists.

Conclusion: if anything, the ideological descendants of the original Polish communists from Ludwik Waryński to Róża Luksemburg are to be found among people who founded Polish People's Republic. If someone now claims they are inheritors of "interwar left", it's socialchauvinism at best, and it gets tested and proven every single time, parties like PPS, SLD, UP, APP, Razem, names like Ikonowicz or Zandberg, all of them talked big and then became liberals lapdogs.