There was hope, and it was stripped away

Let's start off with the obvious: Lil Bro is terrible for hypnotizing and SAing Big Bro. I'm moreso concerned with everyday relationship between the siblings. Now that the disclaimer is out of the way....

Am I the only one who found it hard to root for Big Bro?? The characterization was that he hated Lil Bro for simply existing, then it was added on that he was always copying him, better than him, etc. I get the inferiority complex part, but narratively it wasn't a compelling enough reason for me to sympathize with him when he did nothing but be a dick to Lil Bro...simply for existing.

He's aggresive, abrasive and never takes the opportunity to have an actual conversation with Lil Bro. Mind you, Lil Bro's not helping the situation either with his petty, conniving antics, but the both of them could benefit from a heart-to-heart. Then we get to Ch.27...

IT WAS RIGHT THERE (╯°Д °)╯╧╧ They were primed and ready to hear one another out, and then Big Bro goes and ruins it by being a simp! Yes, I'm aware that doesn't fix the hypnotism plot, but picture this:

The brothers have the heart-to-heart and realize how one another's behavior has affected the other party. They slowly learn to get along with the new understanding that they have of each other.
That way, it opens the path for either A) Lil Bro to confess and Big Bro can have the option to forgive or hate him for his manipulation or B) Big Bro's shattered memories finally come together and he leaves Lil Bro for good to get with Sunbae. (Whatever love interest you're rooting for)

My main point is that we as an audience could've had some closure for their relationship as brothers before the whole hypnotism plot blows up in their face. Instead - because BL - we have to deal with...all that bs in the last chapter.

Like, I know I am invested in a story when I'm rushing through the smut to get back to the plot (and writing entire thinkpieces in the comment section ╥﹏╥)