Responses
Yeah the parents are mainly at fault. However it looks like the brother noticed his feelings and now purposely tries to take everything away from him. Hes fully aware of what he’s doing, so now he’s not a good person either.
I can understand both Jaeyi and the brother. Jaeyi thinks his brother is stealing his parents from him due to all the attention he receives for his illness. His brother thinks Jaeyi is selfish because outside of the hospital Jaeyi supposedly has all of his parents attention and he's healthy, so how can't he get at least 10% of his parents attention
This is very realistic, one sibling gets neglected in favor of the other, learns to be neglected and get by on their own, while the other sibling who gets most of the attention because they need more help, resents the other because their parents talk about the other sibling as the model child who doesn't cause any issues. So both siblings think the other is the favorite
Their parents are at fault for how they handled this situation and made both brothers resent each other