I hate to bring up mods since I dislike how they have been used to give Bethesda a free pass for years, but this is why I always used "Start Me Up." You get to skip the trash intro and it even changes 99% of all mentions of you being the character Bethesda came up with. The only thing the author missed is a single response to the BoS doctor when he asks about your history as far as I know... easily ignored considering how great it felt to not be that doofus Nate. There's another one that mutes the protagonist which also works wonders for immersion... but yeah, I totally agree with you about the forced backstory.
The thing is, Bethesda seems to abhor the idea of treating this franchise like Elder Scrolls, where the PC is a blank slate, so I don't really expect anything else from them. Although the whole married with children thing was probably going too far...