Are you suggesting that the west should have gone further and declared war on the USSR after Germany's defeat, such that, it is consistent with the view that Poland should exist with its pre-war government, otherwise, the governments of the west are just hypocrites? Was the cold war not hot enough such to meet this bar? These glancing apologies for Germany's actions in WW2 seem ludicrous.
I believe the idea is realistically more that the allies should not have declared victory as they did, if a free Poland was truly their goal.
If you fail to achieve your stated goal and you still declare victory, you are either lying about your goal, or you are lying about your victory.
Invading the USSR probably wasn’t the most efficient way to ensure a free Poland. Have you heard of negotiation? Did the USSR really not want anything that the Allies could give to ensure a free Poland? Or did the Allies simply not value a free Poland enough to give up something big enough? If it was really their main reason for entering the war, don’t you think the negotiations math would have worked out differently?
While that can be an interesting lens (though I think it erases material context), the point I was discussing was not about the validity of someone declaring victory, but rather, about countries invading their neighbors.
