I'm actually a hater of the "I don't belong here" arc. Let it enddddd, this manga comes out too slowly for me to be okay with the dramaaaa
Let them be brothers
Tldr; being brothers does mean feeling alienated at times, its only when theyre adults that you get that sibling brother bond
Tbh, as a brother, there definitely is a point where you start thinking I dont belong here. Esp when you see a parent fawning over a sibling over the other. Its either you get excited and coddle the younger sibling too. Or what ive experienced is they get jealous over a younger being coddled and they end up growing distant.
What i do appreciate here is that this normally happens when theyre kids like a baby and toddler competing for parent affection. So in a way they kinda going through the motions becoming real siblings by arguing like this and resolving it in a dumb tangential way.