Poland has a pro EU government now, albeit society remains split. Still if they wouldn't align with the EU, they would have to align with Russia. They are fiercly against that.
Slovakia and Hungary are in the same boat. Orban doesn't really want to leave the EU. He knows that aligning with Russia would kill the countries economy and he either gets to rule over rubble or the people will kill him.
They instead want to play the EU and Russia by playing both sides for as much opportunistic gain as possible. By not playing, the EU calls the bluff.