... fanservice manservice aside ...
This setting feels exhausting. It's good, not reasonable.
Even if this world doesn't have any strict cause for power corrupting, it always does. Even meteor magic is mutative but wild, not evil. Yet there's some Faustian backlash that sometimes comes out of nowhere and just breaks people. It worked back in the post-impact era, as a survival story where ambition felt cursed, but I'm a bit tired of the trope by now.
I really don't see how Atreyu and Artica had to suddenly snap and decide mass murder was the best option. Atreyu steered it and still failed his true objective. And Arctica did resist, but of course her resolution wasn't permanent and it's up to some interlopers to butt in. The thematically consistent but unsound corruption is fine as a fairy tale, but it's still forced as hell. An evil airship spirit or cursed crystal doesn't resolve the trend.
To be fair though, a civ with nearly
any magic system that doesn't have some kind of invisible wall preventing development (and locking+limiting high technology to big rare things) would go space age within a thousand years. I just prefer some reason for the wall or metal-themed 🤘 corruption or whatever. (Can you imagine 1% of the airship's generated force put into construction equipment? Renaissance.)