See authors, it's really easy to write a piece of shit seme that's arrogant and toxic, yet still at his core, a likeable character who you want to see redeemed and enjoy reading when they get their comeuppance.
There are so many authors who want to write uke torture porn that they don't think of the kind of character they've moulded their semes into, such that any redemption arc that doesn't involve them being completely broken down and deconstructed as a human being for like a 100 chapters feels unsatisfying.
Characters like Yeonghan and Taejoo from Low Tide in the Twilight are absolutely awful to their respective partners (Taejoo obviously far more so), but the authors cared enough to properly characterize them such that you can see even early on that they possess true potential to grow as characters in ways that most semes are never properly characterized as.
Yes, this is me hating on Jinx in another comment section and y'all can't stop me lmao.
I mean you're comparing two different types of storytelling. I haven't read Jinx because I didn't like the first couple of episodes, but it's one of the most popular BL web toons out there. There is a large audience for simple characters. Complexity isn't easily digestible for everyone and you have to have that quality for a story of every medium to be successful. It's why mainstream shounen is way more successful than more complex and critically acclaimed anime series.
But so is the other example I provided with Low Tide in Twilight. That manhwa was insanely popular too and Taejoo is arguably even worse than Jaekyung from Jinx in many ways.
It's not a matter of narrative or character complexity to me, it's just a matter of deft characterization. Its building your seme out with the understanding that even if he is a piece of shit now, you still have to show what traits make him attractive to the uke (and hence the audience), and what traits he possesses that indicates his future capacity for being an actual viable partner for the particular uke.
And unfortunately, a lot of authors just aren't good at that kind of characterization since they usually lose themselves missing the forest for the trees, or in this case, too lost in building out uke torture porn to actually realize that the seme needs to be redeemable by the end.
I always find it really funny how authors just think its somewhat normal to bleed during anal sex. Unless you are being r*ped or *insanely* underprepped (like broomhandle dick meets hole the diameter of a hair), this is not an issue. Men don't have hymens in their ass.
If someone did bleed from anal, especially as much as we see on those sheets, I'd be scandalized from the non-reaction by the top. That's a doctor's visit in the waiting lmao.
Yeeeeah I hate how common it is to see blood in manhwa, like it's just something that happens frequently enough to not be a big deal. If there's blood on the sheets you are doing something VERY wrong and if I were in ML's place I'd be horrified.