Has anyone read the raws?

I'm about to burst I just caught up with the raws and I'm so angry at the sunbae that my head hurts I honestly have never hated a character like this because honestly, for the most part antagonists have their own position and resoning that, while it clashes with those of the protagonists to create an interesting plot, still makes sense and makes you go okay he's an ass but he wanted this, or this happened between him and the protagonist so he turned out like that; with the sunbae his role is to invest time an effort into making this boy who has never done anything to him miserable? For the sake of plot? The story is very engaging and the art is beautiful and I already came this far so ill keep reading, but sunbaes role is a very disappointing thing to me tbh, beyond just hating the character i wonder why the author came up with a character like that.