Because Polish women dont want Polish men. In mind of typical Polish women everything that is not polish is better - doesnt matter if its furniture, chocolate, restaurant or men - non polish are better in their minds.
We were 50 years under russian dictatorship that lead us to extreme poverty and total lack of freedom, in the mean time west world had nice cars, nice cities, nice planes, nice everything. No wonder anything that was Polish or slavic was seen as bad.
Then we broke out of communins and western propaganda came in of how life can be exotic and how adventurous sex is awesome, while at the same time there were 80% catholics in Poland that learnt their daughters to not fuck around. Here you have sad poor parents telling you to not fuck around and here you have awesome western life where everybody have multiple partners.
And thats how typical polish woman became a slut that doesnt like anything thats polish including polish men.