Keystone (Crossbreed Series Book 1)

I’m a couple of books into this series, and there are some things I really like:
it feels like a tabletop game in which everyone lovingly handcrafted their characters in great detail, in communication with each other and the GM — by which I mean the side characters are interesting and feel like they have not only backstories but ongoing stories of their own. The backstories might occasionally intercept, I suspect, based on a few hints.
while “enemies to lovers” isn’t my favorite trope (it’s fine), “people who under-estimated each other develop real mutual respect” is … and I also like a slow-burn romance; I think both are where we’re headed with this series.
there are many good lines, including several that made me laugh aloud.

Things I don’t like:
what a deeply cishet world this is, with a distracting amount of sexism — I can't tell for sure whether that nonsense is Watsonian or Doylist, but I will try to give the author the benefit of the doubt, here
the main character’s motivations are sometimes very thin and hard to buy into; but then, her vampire hate is lampshaded by another character, so I am holding out hope that there’s more to it

Neutral:
I know foreshadowing is hard to get right; while sometimes it’s done well, other times you know who the villain is when he first steps onto the page