Most VN are japanese, that's why there's barely any woke diversity and all that, because that country haven't been tainted with such needless political conflict, as far as i know at least.
And if you're talking about having a problems with VN that has anime artstyle then.
The only race anime have is simply anime, no causcasian, latinos, asians, africans etc. if you have problems with anime, just treat them as it own thing, they all have the same oversize eyes and unnatural body structure, just treat them as a completely different fictional beings like dwarve or elf if you're really that desperate to have something to project yourself on.
As for your complaint for not having a girlfriend, well wether you're young or not, like the comment above, just go outside and socialize, just try, and if you made a bad first impression with strangers then that's okay, don't think too much about it cuz what's the worse could've happen?
And one last advice from a stranger, don't mix any IRL politics such as diversity with video games, it'll do nothing but ruining your experiences just like what you doing now, just don't think much about it, play the games enjoy the story, and try not to project any IRL politics you have in your head into the game you're playing, just disregard those thoughts thanos snap it if you can.
and please, don't use VN or any video games to cope with your personal problems, just think about how you can improve your life, remember there are millions of solutions to any problems, and you just have to search for one