The best thing you can do for your country is to recognize that and take steps to address it in whatever way you can.
The country is doing just fine if you consider where it was in 1989, we will be just fine as long as we are free (Don't fret).
But you cannot smear all the people attending the march as BNP of national front supporters, many are their to voice concerns about foreign political policies being forced upon Poland that are not compatible with the country and it's traditions, there are people there who also voice their concerns about the political state of Poland.
But on the whole all are there to celebrate Poland freedom from foreign slavery and oppression.
I think that there are many European countries sliding back much faster than Poland, look at Britain sliding into murder and anarchy and alienating itself from the rest of Europe with Brexit.
Both major political parties in Poland make it clear that Poland stands with Europe and the European union.
Yes there is the odd spat like the migrant crisis, but Poland was right to stand it's ground as this is now an agreed failed policy that has caused much damage, especially to a good leader and friend of Poland Angela who's only fault was to try and force that failed policy upon Poland, sadly she has now had to fall on her sword to ensure political stability in Germany.