I want to say "good female characters" BUT that's not actually true. There are plenty of Korean webtoons that have good female characters. It's just when they're bad, they're REALLY misogynistic/infantilizing in a particular way that's really gross.
Also a more nuanced approach to, shall we say, a "wild" lifestyle. This isn't just a Korean thing, it's an Asian continent thing in general (my grandparents subscribe to this culture), but often times anyone who leads a more social/party/casual inebriation lifestyle is portrayed as someone who deserves bad things happening to them. Drug users are all horrible evil people, etc. In the West we tend to give more credit to people like that and accept that people fall into this lifestyle for a myriad of reasons, most of them not evil. Again this isn't just a Korean thing, because I had attempted to watch an anime last fall that was supposed to be about "tough gang kids" that ended up them like... doing an unsanctioned drug bust against a marijuana joint and everyone, literally EVERYONE associated with the drugs was either drooling braindead or evil. And I was like huh. So gang activity, gang wars, that's all a-ok. Smoking weed though - you deserve to get thrown off a building! (For the record, I am a recluse who doesn't even ingest caffeine due to health problems, let alone any stronger mind-altering substances, so this observation is in no way fueled by self-interest. It's just... dumb to villainize something that CAN be of help to some people). And again not EVERY bit of media from Asia fails in this department, it's just when they do it's, uh. Really harmful, IMO.