oko.press (has some english-language articles; investigative journalism), onet.pl (tabloid) , tvn24.pl (TV station), krytykapolityczna.pl (openly leftist so unpopular in Poland)

You could get a sense of it from wyborcza.pl, which is both the largest/most-prestigious newspaper in the country and quite strongly opposed to the current Government.

Or polityka.pl, which is kinda like the New Yorker magazine of Poland, insofar as it is a weekly upper-middlebrow witty news magazine with giant circulation, unabashedly opposing the country's executive.

If you want a TV show or videos on the internet you could have a look at fakty.tvn24.pl. But really there are tons, these are just off the top of my head and the list goes on for miles.