is it just bad writing?

i don't know how to explain it but i need to try: at first it really feels like garam was like "haha this cute awkward kid wants to be my friend" 100% platonic straight friendship and nothing else until yoonsung comes and then he starts to notice that jaewon is uncomfortable with yoonsung or that yoonsung might be bullying him or whatever... and my confusion starts here bc yeah it probably seemed like yoonsung was taking his teasing too far and as a new friend and class rep and professional bully fighter, he naturally wants to stop yoonsung... i get that... but when does his concern for jaewon turn into jealousy and attraction to him? does the author really expect us to believe and accept that? plus the author tried to throw in the little scene with the class president girl, as if he suddenly had feelings for him all along and enough for his friend to notice but not the audience (or at least i didnt notice any romantic or attraction vibes AT ALL during the movie or any of the classroom moments) it really feels like the author knew that garam was absolutely not The One and forced some scenes to force their endgame. its fuckin bullshit.
and yoonsong is just a menace with an interest in teasing jaewon and fucking with the other two leads.
plus i really liked jaewon and junseos friendship and gay alliance, but the development of the romantic attraction felt extremely natural and basically unavoidable with how natural and understandable it was... this is literally homophobic towards junseo who is the most gay character and yoonsung who also ended up being actually gay, to just let jaewon pick the literal confused straight boy (you could never convince me that he's actually gay)... dogshit writing 3/5 just for junseo and yoonsungs storylines