I agree the idea of origin characters is lame and part of the Larian's game philosophy of "let's just do cool stuff who cares how it affects the narrative" but based on the amount of downvotes I get every time I mention it on Reddit it's not gonna go away.
That said, I don't sure how much they really "steal the spotlight" in practice, even if it's true in theory. I'll be happy to hear some examples if any of you guys have any.
I feel like the "clean slate" status of my character actually works to my character's advantage. I'm not sure if it was intentional, but the fact I'm surrounded by crazies, each one of them with more issues than the other, makes my vault dweller seem like the only adult around. It reminds me of (and I can't believe I'm saying it) Persona 4, a game that wrote the book about generic MC.