My conclusion is indeed the writing used to be so good probably due to the Team GJ writer suffering from depression. Never has emotional suffering been better utilized, clearly.
Oh I was thinking about that for years now. Especially seeing how different the Sumin and Sungji arc felt. Also how fast the love between Seju and Won is developing. I would also say the author/artist has gone through a similar situation like Seju and Sumin before.
Anyway, it seems like simple stories like that is what people drink like water. If you check the YA books as well, the love interests are way worse than that, and generic love triangles get much more praise than deserved.
YA stories with teen audience need a different format. I guess the main audience for romance in manga too is these ages as well.
I'm not saying there's something wrong with that, but the problem is when you market it differently from the start, then change direction.
Wdtfs was more of an adult story, but lately I feel like it fits into a teen audience better.
However I still wouldn't compare wdtfs with Lilly Love or Pulse. These are pretty bad, worse than citrus.