They had one older brother and 2 younger, but each one of them had their own traumas, so I think they don't really care
That family is an extreme alpha/extreme omega family. They have 5 kids who are extreme alphas and one extreme omega. Extreme alphas can have problems with feeling emotions depending on when they present, as it can go so far that they are unable to feel any, Grayson is such a case. I'm not sure how it is with the others, if the are inbetweens, aside from Chase who is a real emo kid. His parents are actually ok, the omega father is really nice, so i don't know what really went wrong there. My guess it that there are probaby problems after they present beeing around extreme omegas (because i got the impression they had less contact with him at some point) or they had seperate the the youngest sibling form the other or it's someting else. And their alpha father was probably too busy with work, and the omega father needs to be near the alpha father because of his health conditions. But that's all just guessing.
I know Greyson traumatized chase but did nobody else know or defended him from Greysons actions? Like doesn’t he have an older brother!? (〜￣△￣)〜 I haven’t read the novel yet but I will take spoilers from people ٩(๑❛ᴗ❛๑)۶