Junseo didn't end up happily (by the end of the story, but i'm sure in the future he's living it up with Yoonsung), I don't understand the hate for Karam and the main couple. The main couple had more moments together than Jaewon did with Junseo, tbh, and although it's heartbreaking that Junseo was rejected and needed time to recover, Jaewon's not obligated to love him back. Just because you listened, advised, and supported someone doesn't mean they owe you their love. Jaewon still helped Junseo heal, even if he didn't love him back. Of course, I have no rebuttle if you just thought the main couple was bland and boring... they're highschool kids who like each other, I'm glad they're not fighting.