That still doesn't justify why the two blamed a child for the problems that adults imposed on them. The brother made his little brother life hell. Blaming him for the death of his mother and for being discovered having sex with the butler... Imagine growing up being hated by your brother hearing these things every time you meet him, being manipulated by the butler and being blamed for something he was not to blame for.
I hated them but I can understand where their resentment came from. They wanted to unleash all their anger for having their relationship ruined onto something, so the next closest thing was the cause: Tomoe. In saying that the brother still demonised him and belittled him for being a bastard his whole life so I still don't like him & I honestly hope he doesn't get a happy ending bc I believe he shouldn't have his cake and eat it too.

Why does ppl hate his bro and the butler? The two loved each other but since their relationship been found out, they broke up. Takashi was beaten to permanent scar. Tomoe's bro never get married. His bro don't hate tomoe but he despise his fate to carry the family lineage.