I've written a few unpublished books, and to be honest, it's just not how characters behave in my head.
For years, I'd have ideas about books to write or characters to explore, but they never made it onto the page.
The stories I've written don't really give me a choice in my imagination, if that makes sense? My main series of books follows a fairly even split of male/female characters, but I didn't decide the main female protagonist had a best female friend, or that after they fell out her next best friend would be a man, or the female friend's new bestie would be a gay woman. It just... came as a package, as if it all already existed?
FWIW, I also hate the trend these days to decry people as 'problematic'. Some of my characters are shit, some of them are good, some occasionally do shit or good things regardless of their intent or general character. Writing is as much inspiration as design, but if you are designing, you absolutely should be designing 3D humans, with all their foibles.