Where every single indifferent person gets killed too, not just the bad people. And that would have included Hae Won getting killed.
It would have been nice if Hae Won at least got injured.
Or a better ending would have been to have BokNam appear from the same motorboat and Hae Won not in the frame in the scene where she gets to shore and have the movie end right there.
That's pretty much what happened, but I can understand why Hae Won survived simply because the kindness she'd show her friend as a child. And it was also not through a lack of Bok Nam TRYING to kill her. I think it should have ended with her playing the flute while Bok Nam dies of gunshot wounds.
This did remind me a lot of "Dogville", which got excoriated for being "anti-American" simply because it was set in a small town in America (one of those many, many American small towns that look just like a completely undecorated sound stage). By that logic, how come this Korean movie isn't considered "anti-Korean".
Also, I think Hae Won survived because the "standing by and doing nothing is just as bad as the crime itself" is a more potent theme if we see a character actually learn that instead of get punished the same way that everyone else did.
"Weirdness was all he cared about. Weirdness and sex and plenty to drink."