I'm gonna be honest i don't understand why you guys are so upset with the parents here, the MC literally asked for the situation he's in and when the parents notice a big drop in grades they worry about the situation he's in, usually in other mangas the MC is "forced" by the parents to take care of the siblings.
I mean yes the parents are shit but on the manga scale of parents they're not that bad since usually they're neglectful as fuck.
They neglect them because they like their work too much, they dont seem to be in any financinal trouble and still overwork which is extremly selfish,
you say mc asked for this situation but the other solution is a babysitter, and mc is very kind so he doesnt want them to expiriance what he did, to mc this "choice" that you speak of was a non existent to begin with,
so in conclusion what mc is doing is very noble and right ting to do, he is sacrfising himself, the thing he wouldnt need to do if his parents werent shitty,
and they come in like a caring parents after that AND CALLING HIM SPOILED EXCUSE ME, they have gal to not give up their job even a little bit, and then tell him why are you not focusing on yourself, ITS BECAUSE OF YOUR SELFISHNESS,
they worry about the situation he's in
and thats the problem because they are the reason he is in that situation
I mean yes the parents are shit but on the manga scale of parents they're not that bad since usually they're neglectful as fuck.
just because they are less shit doesnt mean they are not shit
to me it just seem very hypocritical that they are saying to live his life while they give zero effort to care for the twins, which would help him live his life