i always loved the Geten Himura reveal and blurb of backstory because it really rounded out the world of bnha. imo. It was a relatively tiny detail, but it showed that problems were deeper and more complex than just Bad Man, because many things were interconnected, and how tragedies can occur due to those chains of intersections.
Like, the fact that the Himura were traditional wealthy landowners was significant, because it meant they were the exact sort of old-money conservative douchebags that would hate change, that would marry cousins to keep their bloodline pure, that would raise children with the expectations to sell them off in arranged marriages. And because they were an old landowning clan, they would've had influence over local village politics - so is it any surprise that villages would be awful towards heteromorphs, when the village leaders or elites were people who rather marry their cousins than 'taint' their bloodline with outsiders and possibly have a kid with a heteromorphic quirk?
It meant Rei was always prepared to not marry for love, but be married to someone rich, and stay in that marriage no matter what, for the sake of her family. I don't know how low the Himura fell, but given that they're a big landowning family, they probably weren't 'starving in the streets' poor and in need of cash for survival, but rather didn't have the money to support their previously comfortable lifestyle. Rei kept in contact with her mom, but the mom could offer no support when Enji turned abusive - whether it was because the mom was also trained to be a traditional housewife and thought this was all normal, or because the mom needed the daughter to keep up a lifestyle, it's all fucked up. And plus, the marriage broker in Chapter 301 also mentioned "Himura women" like there's bunch, and there probably were - Rei's sisters or cousins also getting married off for money, also stuck in this clan-obligation-duty-dysfunction-web.
Enji was the asshole Rei ended up marrying, and everything that happened is his fault, but there very much could've been five other wealthy assholes that her parents had lined up for her to meet. In fact, Enji could've been a particularly useful idiot for the Himura - at the time, Enji was only 21, 22 years old, only having reached the age of majority the year or two before; his father was dead, so he's the head of his household, so they don't have to worry about pesky in-laws; he was probably nouveau riche from his Hero career, so he had no idea of old clan politics; he wanted a quirk marriage, which fit perfectly with their blood purity ideology; and he wanted a kid immediately, sealing the deal. Enji's selfishness matched beautifully with Himura's own messed up issues.
And so the problem isn't just Enji, and it didn't affect just Rei, it's a whole thing. And I so always thought this reveal added so much to the landscape of HeroAcaWorld, where quirks didn't only brought new problems, but exacerbated old prejudices and inequalities, entrenching them even further into the fabric of society. And it would've been fascinating to see how Heroes would have to deal with that.