No you're not the only one.

I wouldn't have minded if they were just purely ontologically evil- "They're from hell, they're antithetical to life" kinda deal like the curses in Jujutsu Kaisen. Make them explicitly supernatural and just roll with it because the story needs an uncomplicated villain- yeah ok, understandable.

It's all the in-universe evo psych nonsense given as "world-building" that gives me the heebie-jeebies, especially in the way in which those justifications knowingly or unknowingly mirror real-life bigotries. Having a sapient fantasy race that cannot change their inherent nature due to biology, just so that the protagonists have a narrative excuse to blast them really doesn't sit right with me at all.

Which is a shame because yeah, otherwise the show is actually pretty good, especially at exploring the breadth of human experience. So to have this weird blind-spot is baffling.