I am loving the metas protecting Yotha from the very undeserving hate he has been getting. So obviously, i am here to add my two cents:
We forget that Yotha literally did not comprehend his trauma, his brothers' traumas, his father's trauma till literally less than 10 episodes back?? Like that boy has blocked most emotional comprehension and understanding as a way to cope with his feelings- obviously, he isn't going to be the biggest support for Faifa, or anyone. He has just barely started to support himself, and his starting line is being okay with dying in a bar fight??
He was told by Newton, who he trusts to be the expert on everything as anyone would towards their "settled" elder brother, that Faifa does not know how to love. He has never seen Faifa being truly in love. He has never seen Faifa treat one person as special exclusively. Especially because he himself literally always runs away from social situations. It is okay for him to doubt Faifa's abilities because he's worried. As many are. About their brothers.
Why did Yotha not tell Faifa about their mom? Because was it so wrong for him to think their elder brother would have already done that. It isn't even as much as Newton's fault. It's the mother's fault for not informing the son who was supposed to be picking her up, and the rest is just an unfortunate misunderstanding. Obviously this doesn't mean that Fai's feelings are even a little invalid. It only means that his brothers, equally validly traumatized brothers, are not to blame.
And lastly, they ARE TEENAGERS. LITERALLY 19-20 YEARS IN AGE. And heavily traumatized, at that. They are going to be making mistakes. They are going to be hurting people they care about. They are going to do things they didn't mean to do. It's called life. It's okay. He is not evil, he's just a teenager.