This is, frankly, ridiculous. PiS is merely trying to adjust Polish media market to EU norms regarding majority shareholders from outside the EU in the media sector. Germany and France have much harsher laws in this area, so I don't see what the problem is. Foreign owned media, like Sputnik or TVN, have to be regulated as they are in the "old EU" countries.
One can't help but notice the hypocrisy of PO who are trying to enforce a bill to delegalize TVP Info, but they would defend TVN with their bare breast :)
often critical of PiS policies
You put it very mildly. They are openly hostile towards the government and their policies (often to the point of losing objectivity and journalist integrity).
The problem in general is that we have very few independent media in Poland. Most of them are either blatantly pro-government (e.g. TVP, Gazeta Polska) or openly hostile towards it (e.g. TVN, Wyborcza). There are some objective (or semi-objective) weeklies, like Tygodnik Powszechny
or Do Rzeczy
, but major media clearly stand either on the side of the government or the opposition.
In any case, adjusting media market laws to the EU standards is a must.