For what its worth PIS policies aren't all bad. Their social spending is apparently quite generous even if probably more intended as bribes that will be stopped the moment they gained the system enough to stop needing them. And they're anti Russian as they should be even if it likely stems more from a ''Poland isn't yours to conquer'' sentiment.
As for whether they're worse than the alternative. I don't know enough of KO to completely dismiss that but since one party wants to curtail and chain up, if not outright get rid of democracy and the other doesn't I struggle to imagine it.
"Their social spending is apparently quite generous even if probably more intended as bribes that will be stopped the moment they gained the system enough to stop needing them"
Sorry, but this is Your pure speculation.
"I don't know enough of KO to completely dismiss that but since one party wants to curtail and chain up, if not outright get rid of democracy and the other doesn't I struggle to imagine it"
This is very subjective concept and depends very much on how You define "democracy" (and yes, how You define it, is quite subjective - many actions of PiS considered antidemocratic by its opponents I consider obviously pro-democratic). Can You claim what PiS actions You exactly consider as "curtailing and chainig up" democracy? (Although to be honest I must admit that I am myself sceptical towards democracy - or any other system - as some deity-like absolut which can be never questioned, and even if PiS would be really departing from the Only One True and Acceptable System of Europen Liberal Democracy it is not reason in itself to consider it pure evil from my POV).
E.g. I find it ricidulous that when PiS tries to enforce at least a bit of democratic control over the judges (e.g. before PiS reforms judges in Poland where nominated by the body which consisted mostly of... judges elected solely by other judges, which was unique on the global scale), it is considered "undemocratic".
And for me KO/PO, which lobibied the (not very democratic) EU authorities to suspend the payment of funds due to Poland (very often using outright lies like these about "LGBT Free zones"), hoping that it will cause economical crisis and problems for Polish democratically elected goverment, is definitely antidemocratic. And what's more important, anti Polish. Or when PO was unoficially supporting people who were beating, spitting up and harrasing people who in 2010 were praying and demonstrating next to presidential palace. Or when minister ordered to set fire under the booth next to Russian Embassy during right-wing patriotic march as a provocation. Or when important member of the PO declared that "as long as You are with us, no judge will find you guilty!". Or when Donald Tusk was openly questioning results of elections, telling that "they were really won by Trzaskowski! (KO presidential candidate)". Or when MPs from PO were blocking the hall of parliament by force to prevent the proceedings. Or when during time when President was from PiS (Kaczyński), but PO have majority in parliament, they were harassing president and trying to force him to not use his constitutional competences. Or when Tusk as prime minister sent secret service to newspaper editorial office to take by force materials copmormising his party...
Altough thank You very much for Your approach. Most of my interactions with anti-PiS people looks more like "Shut up fascist whore, if you don;t think that Kaczyński is worse than Hitler, you are brainwashed imbecile, probably pathological drunkard who buys booze from the social benefits".