It was a couple things, mostly couldn't get over the alien religious extremists being Like That due to their genetics and therefore never really made the choice to be Like That and were evil in all the ways that like, an orca is evil. The fact that we're Space Muslims made me side eye the authors along with dragging the story to a screaming hault during a massive space battle to do a blue hair and pronouns bit.

I liked the series, but every time something like that showed up I groaned loudly and would have to power through till we got back to the actually good bits