Yeah you can thank us for stopping Russian advancements in Europe in the 20-30s and defending your island from the Luftwaffe and not getting any credit for it (see).
That supposed lack of credit is imaginary. The majority of all memorial sites in Britain take note of the Polish forces who served alongside the Royal Air Force. Our largest national memorial, which lists the name of the soldiers who passed in both wars, also includes all of the Polish soldiers who died in service of our islands.
Not to mention our many battles against the Ottomans to save the west's ass from mussie rule. You can thank Sobieski for Vienna, if it wasn't for him you'd all be speaking allahu kebab.
Which is ignorant of the many successes by Papal-aligned forces from several western European states including the campaigns led by the HRE across the southern European states as well as the eventual victory of catholic Spain over the Moors. Add ontop of that the fact that powers before the Ottomans were much greater threats due to balance of power and the size of nations at that time, as well as what actually broke the straw on the Ottoman camel's back.
Should I also mention our contribution in stopping the Mongol horde in the middle ages?
A contribution you can take, since your contribution was literally just that - by no means the only force, nor the strongest, nor the final. See Ögedei Khan's expansion of the Mongol Empire.
And during WW2, we fought 2 of the world's largest superpowers without even surrendering, we fought to the last man until the end of the war (See Armia Krajowa).
Poland and every other invaded state. See Finland and the Continuation/Lapland wars (neither of which were ended by surrender). Then see Baltic opposition forces during Soviet rule, which lasted much longer than the second World War. We didn't surrender either - we just went one step further and weren't occupied either. Who stepped into WW2 in the first place specifically to save your asses?
And do tell me, which other army successfully occupied the Kremlin and most of European Russia?
Tell me which other army flexed it's muscles to conquer over twenty percent of the world first and is still one of the foremost politically powerful states despite recent events.
Poland has made many achievements, but not enough for fervent nationalism to be unable to take a joke.