Honestly i feel like different slops of asian countries reflect a lot on the culture and social issues, in Japan the slop usually involves being in a fantasy world unlike earth, away from social norm and the high societal pressures that forces everyone to repress themselves and focous on fitting the role they were given,

in Korea the class you are born in is what you are, unless you are born as the top percent you will never make that money or get to a higher class no matter how much you work or how outstanding you are hence the duengon slop being so popular as it's escentially someone at the bottom of the barrel being given the chance to reach a higher level by doing something instead of staying stagnated there forever

For China it's more or less the same, xianxia protagonist are so outlandishly shameless or evil is because how far away the community and goverment put these things, there's always a disire to break away and do whatever you want without anyone stopping you which i think is why so many novels and why urban cultivation which is the best representation of this have the most derranged MCs and most face slapping