Constantine: abused by his father which arguably compelled him on his dark path, although even if you go with the canon details about straying towards the occult being in the family's blood, having a shitty family life sure doesn't help!

Otacon: LOOK.

Huey wanted to use his 4-5 year old son to test pilot a giant death mecha with a flamethrower penis, murdered the mother of his child when she disagreed, denied it to the faces of an entire militia that he had also partly murdered, and would go on to not notice or do nothing about his 2nd wife grooming his son

AND THEN attempted murder-suicide with his 6 year old stepdaughter because that's a cool and normal way to respond when your son is being sexually abused by your spouse

Carrie: her parents are apathetic stoners who literally forgot she existed but then she found Bruce.

I feel like you could unpack the drug fear-mongering there but it requires also unpacking Frank Miller's politics and UUHHHHHH

Miranda: his dad genetically engineered her in a fashion that kinda strongly implies eugenics??

in conclusion, Rough Times

Thomas is the Worst Father (TM).

I don't think any of my characters have good dads except for like, Carrie tbh since she has Batdad

which may be due to my IRL Daddy Issues but in recent years I like to think that my dad and I have done a pretty good job of having a better relationship

oh! Starkiller!

Galen's parents were killed by Darth Vader during Order 66 and then Vader adopted/trained him

Galen is actually weirdly well adjusted and chill for being an edgelord Sith Apprentice

but also Vader repeatedly manipulated and betrayed him for his own ends

and we know that if he gives in to his anger and defeats Vader it creates the Darkest Timeline