I honestly think it's cause Japan has been doing the BL game for much longer than Korea has so they've had more time to develop. If you look into older Japanese BLs they pretty much are like those trashy Korean BLs. On the contrary I think Korean BL started out by using Japan as a model, so maybe that's why they're like that. These days though there are much more wholesome and nuanced Korean BLs, though compared to Japanese ones there are still far more crappy, stereotypical stories so I get why you're saying this.
I've been thinking about this lately!!!! Reading the popular BL manhwa is like going to the past and reading yaoi where everything wrong was being romanticed! (with prettier art tho, at least koreans don't have that "yaoi hands" issue lolol)
broo the infamous abyss manhwa lmaooo
This is a big difference I noticed between japanese manga and Korean manwha.. Most japanese stories are normal, wholesome and romantic while most Korean stories are all about abusive chaebol using others as onaholes.
Why is it like this?