Poland wont leave the EU on its own
I'm not saying that we should leave straight away. PiS government is doing a good job, even if it's against their will, by eroding the power of Brussel's beaurocracy by refusing to comply with anti-constitutional laws and by refusing to place the EU law above the Polish constitution.
Basically, in our interest is to pick the benefits of the EU ie. open market for goods and services, and to block things that is against our national interest. It will become much easier once Poland becomes a net payer, which is soon. The EU is a toothless dog, there's no reason to be scared when it barks.
Poland is a net receiver of funds, and not a net payer
Not during this round but it will become a net payer by the end of this decade.