i had never seen so many hate comments - both korean and english - directly under an author's post before on twt. like why would you not make the easy choice and milk the side couple since they were so popular? the author had some serious personal grudge against dohyeok istg, nothing otherwise justifies that dog poop ending
right? like you said, generational fumble.
tbh the ending was kinda open ended enough that she can STILL come back to it and give dohyeok the closure he deserves in a new story, but i know her hating ass will not do that. i just wish there more fanfics of siwoo x dohyeok but alas, it's not a very popular manhwa. the only reason it got so popular was bc of the side stories anyway, idk who is reading it for the main couple and their boring ass story.

i don't think it's even correct to call eunho and rakhyun the side couple. they legit have more chapters dedicated to them than hansol and woobin. just refer to them as 1st and 2nd couple bc make no mistake the main couple is eunho and rakhyun.
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now if only the author of 'my suha' could've done this with that story's side couple...