the thing with the brother is random, 'cause it's just for the spin off.
that moment with his family resonates a lot with people, being negative in that he should talk with her or positive in his grasping something for not only his family but for his dreams (kuri helped a lot with that, not only going pro but reaching world stage)...
I'm with the latter, as from what we have seen the mother worries about him, but they aren't as close actually, he knows she works herself to the bone for him and he loves her for that (part of his dream is to help jer), but another thing is being actually closer and that's where the brother comes in, he was not only a brother but also was something akin to a parental figure as he was actually in charge of taking care of Aoi while the mom works.
So, with all said is done when he's learning at an incredible pace seeing his family only works as detrimental, pretty much as how lately his interactions with Hana has being going on and how this has been building up lately. (kudos to the author)
just to comment an extra, she still sees her "brother" on him, so not much of a fan with that, not a fan of projection or comparing him specially since she has so much influence on him (that's why I still see their "relation" as toxic)... she's still better than the sponsor daughter as romantic interest ('cause it has a reason)
sorry for the long post, but too little comments on the view of Aoi, wanted to throw my view too.