Genuinely think some folks need to remove how we, the audience, see characters and relationships from an outside perspective from how those characters actually interact. Like y'all ask for nuance and I'm telling you that just because Nancy has gone through trauma and absolutely deserves to be as messy and complicated and hurt as she wants, doesn't mean Robin wouldn't think twice about dating her?

It's not about whose fault it is or centering a male character, it's about how Robin, the character, would interpret and internalize the facts she knows. She has no idea what exactly Nancy has been through, like we have. She encouraged Steve and Nancy in S4 to get back together, she comforted him when Nancy went straight back to Jonathan. Robin's place as Steve's best friend, someone she trusts implicitly, the person she wants to combine with, puts Steve as an important aspect of her life!

It's not that she hates Nancy! It's that even though they broke up a year and a half ago, there's some unresolved or redeveloping feelings there for Steve. It's not that I think Steve could/would/should be hurt or angry about his best friend dating his ex. It's that, in my opinion, Robin, from what we see of her, doesn't seem inclined to date a friend's ex. It's about Robin, and her personality, and that means her friendship and love of Steve.