How do you view Sirius and Regulus relationship?

I have already done a post on Walburga and Orion. I didn’t expect to make another post about the Black family so soon, but I think the brothers are intresting in their own right. Sorry if something like this has been posted before

In my last post, I said that Sirius and Regulus were the scapegoat/golden child respectivley, and many agreed. We don't know much about how they were before Hogwarts, but both were victims of their oppbringing and it whould have impacted their relationship

I think they cared for each other, but they cared deap down or keept it inside rather being outwarthly caring (at least later in their life). At first glance, Regulus was everything Sirius stood against. He was a death eater and (according to Kreacher) was proud to serve the dark lord.

In Deathly hollows, we see that Sirius' room had posters of muggle women while Regulus' had slytherin symbols all over it, very clearly showing us a difference between the two brothers. One was a rebel, the other was not. I don’t see them as opposites, but it seams that they handeled their parents diffrently

One thing that always irks me is whenever Sirius gets treated like he's in the wrong for saving himself and leaving his abusive home, because he abandoned his brother. It's natural that Regulus has his own fealings, but it's one thing to have a character think something and another to have the naritive treat Sirius like he was the bad guy for doing something. Sirius wasn’t responsible for taking his brother with him

I do think that Sirius felt more at home with the Potters than at Grimmald place

There is however a moment in Deathly hollows where Hermonie theories that Regulus cared about his family and that’s why he didn’t tell anyone his plan. It's not him himself, but none the less I think it's worth to bring up because Harry emediatly drew attention to Sirius. Almost like the book itself wants us to think of Sirius

But what do you think?