The essential message underlying this surprising Polish film is undoubtedly one of guilt. A guilt that attacks everything and everyone and from which no one is exempt. When faced with an extreme situation, everyone explodes like a supernova, throwing accumulated guilt in all directions, be it alcoholism, adultery, indifference, cowardice, corruption, arrogance, incompetence, violence, lust, greed, etc, etc, etc.
Only children are innocent. Only they don't carry the guilt with them. But only while they are children. Life takes care of heaping guilt on them if they live long enough.
Simple, effective, sometimes even blunt.