Who better represents Poland in Europe
is this really the most important factor for voters in the Sejm elections? probably not, since all polls asking for that vote show PiS having a continuing commanding lead with a similar margin as in 2015: en.wikipedia.org/wiki/Opinion_polling_for_the_next_Polish_parliamentary_election frankly, my answer to "kto lepiej reprezentacje Polskę w Europie?" would be "kogo to obchodzi?".
Projections for the 2019 elections today are not only to be taken with a grain, but with a boatload of salt, considering the huge fluctuations in pre-2015 polling. PO then lost the elections in the last couple of weeks(!): niepewnesondaze.blogspot.it/2015/10/w-tygodniu-przed-wyborami-4.html
Should the government of Szydlo resign?". More than 42% answered "definitely yes" and 18% "rather yes".
that would be in line with general polling. 60% don't like her today, and ~62% did not vote for her in 2015.
If you have only 50% election participation, the key to winning the election is high turnout of our own base. It pays better off to energize your own base than to try to win voters from the other side. In this regard, voting against Tusk was a cheap move to keep their own base happy.