I feel like the author is putting less effort into the art itself, and the story writing i...

I agree. I was really enjoying it but then it just started going downhill. I usually don’t let the art bother me too much, but the writing was disappointing, especially toward the end. It sucks because this story had one of my favorite chase arcs

I feel like the company or the editors wanted more chapters and more drama to squeeze money out of readers and author wanted to ended long ago but now doing without enjoying it now. But it is just an opinion and theory. I might be bs-ing or not since I don't much about the author or the company

The artist has been dealing with herniated disc for the entirety of season 4 production. I think they ended earlier than intended for the artist's health. I'm pretty sure there was supposed to be more. I feel like there was supposed to be an arc related the JH parents, specifically his mum accepting their relationship. They were setting up for it at the beginning of the season. Same goes for modeling stuff for JH.

Anyhow, I'm sad that this was ended earlier than intended but I understand. It's still a pretty decent ending even though it was rush. I still enjoyed and love the series with all my heart.

Hopefully, we'll get side story after an adequate rest for the artist!

I also think an author saying it's the "end" of a series isn't always set in stone. I've seen so many come back with side stories well after the story is completed, after saying it was done. Punch Drunk Love, 4 week lovers, (Sadly) Cherry Blossoms after Winter, BJ Alex, On and Off, and Love is an Illusion to name a few.

i think things could just end at the han river

Oh for sure. But this one is case of writer and artists collaboration. The writer(Pangin) might want to revisit the story they completed but the artist might not want to. The comic industry is always tougher on the artist. Hudadak might be done with comic illustration for good. We don't know but that's the sort of vibes I get from browsing her twitter. Hopefully not! I love her art! It's really neat and easy on the eyes.

Also thanks for the unofficial translation!