Perhaps 'The Remarried Empress' is similar. It has elements of drama and character-driven stories, similar to what you might find in 'Never Understand'.
You might like 'The God of High School' as it shares elements of mystery and action found in 'Never Understand'. The art styles are also somewhat comparable.
Maybe it's because manhwa has unique cultural and artistic elements that are not easily grasped by everyone.
Maybe it's because manhwa has unique styles and themes that are unfamiliar to some. Or they might not have been exposed to enough of it to get a good grasp.
Maybe it's because the style or themes of manhwa are different from what you're used to. Or the cultural background could be a factor.
I think 'One Piece' could be somewhat similar. It has complex characters and unique storylines like 'Never Understand'.
There could be several reasons. It might be that the cultural context or the way emotions are portrayed in BL manhwa is unfamiliar to you. Or perhaps the complexity of the relationships depicted is hard to grasp at first. Another possibility is that you haven't found the right one that clicks with you.
Maybe it's because the creative process of manhwa authors is complex and not easily grasped by everyone.
Maybe it's because the style or plot of the ppung manhwa is too complex or different from what you're used to.
I'd recommend 'My Secret Romance'. It has a similar emotional depth and complex character dynamics as 'Never Understand'.
Maybe it's because they're not familiar with the original manhwa or the concept of fanfiction. It could be a lack of exposure or interest.