@Qelix It's a shitty family because they were extremely distant to the point of borderline emotional neglect. There is some serious dysfunction here despite things looking fairly benign. I mean think about it, really. Are you telling me they never ate together even on off days? Like okay, you work late, but do you work 7 days a week? You must at least have one day a week off of work? What are you doing then? Why are spending that time out of the house or locked up in your office?
And as you mentioned the grandparents are shitty too for just leaving the kids to themselves like that? What kind of person just thinks it's alright to let your direct close relatives, that you live with, eat by themselves on a daily basis unless they specifically asked to be left alone?
On top of that, it feels they didn't even really talk to the kids about why things were the way they were. Kids are smart enough to understand many things people don't give them credit for. So that's some grade A shitty communication there.
So if he feels like he was neglected as a child it's fairly reasonable to say he was until we a shown otherwise. Getting people who are normally off doing separate things together for group photos to fake some semblance of family unity does not invalidate all the time he and his little brother spent alone not even knowing why. So until we are shown that they did try to at least communicate the situation to them then he is in the right as far as I see it.