Divorced parents time
Yamaguchis parents aren't divorced but his dad is always drunk.
Tsukishimas parents aren't divorced ether but his dad is never home.
Yachi, they're not divorced but they often argue about how they should raise her.
Kageyama, it just happened one day, he doesn't really know why, it also happened at the same time his grandfather died.
Hinata: his dad left when Natsu was born.
Sugawara: They would often argue and during those arguments he would have to tell his younger brother it was ok and so he became a parent figure to his younger brother.
Kuroo his parents got divorced after his mom cheated and he found out so he told his dad, this made not only his mother blame him but his sister, they actually didn't get divorced when he was four which is when they found out, they got divorced when he was 6 and he and his father moved out when he was 8, Whenever his parents would argue he would put the pillow over his ears to try not to listen and he still does this out of habit and he still hears it.
Kenma, they got divorced and whenever they would argue he would play his game to distract himself.
Oikawas dad left when he was 3 and he hasn't seen him since I didn't either his mom or sister want to talk about it.
Iwaizumis parents aren't divorced but they argue all the time ever since he was little.
Akaashis parents aren't divorced but they've never really shown each other love, or him love. They didn't share a bed they ate in separate rooms and would often point out all the flaws in Akaashi, and sometimes even go as far to tell him he's a let down.
(Literally everyone in shiratorizawa has a bad at home life but I'm only gonna talk about five people)
Ushijima - it's literally canon his parents are divorced and his mother hated him because he was left handed.
Tendou - Tendous parents would argue about every little thing and wouldn't get mad at the slightest things, not only at each other but everyone including Tendou. And you know how literally no one talked to him at school so the only person he had was his grandma.
Semi - His mom had him at 19 and her parents kicked her out but Semis father found them a place to stay and they were always really supportive of each other.
Shirabu - you know the song dollhouse? Yeah that's his family.
Goshiki - Dad left and his mother always praised him no matter what.