Supernatural or dupernatural. It sucks you in with the hope there will eventually be some meaning and redemption for the violent slayings carried out by the demonic trio of beasts and damn-angel messenger. That people could be fooled by the devil is not surprising, the religious right would be prime candidates with their love of Old Testament excesses and retribution. This is the redeeming part of this series, the true evil of human beings who try to take advantage of the situation. There are obvious parallels to the Trump government in America, Elon Musk and their sycophants. However the series meanders around, characters come and go, the one constant is violence. However deeper meaning and nuance is missing. Enjoy the ride but don't waste your time trying to understand why things occur, The first season will rev you up but leave you disappointed, the second season is so disappointing and absurd it will make you wish there wasn't a second season. Koreans make some good cinema, this one is borderline. Ignore the hype.
I think you have to remind yourself that this series is based on a webtoon/cartoon which has a license to be extreme and obtuse. Wanton violence in a cartoon is not as confronting as the same when acted out with real people. The producers/director failed in that translation.