I JUST finished Abominable. The observations OP is making really apply to Abominable as well IMO.

Without spoilers, it really seemed like the book couldn’t pick a lane towards the end. There was some Scooby-Doo nonsense that I just wasn’t onboard for. There was one threat, then it was clear that the threat was actually a different thing, then at the end maybe it was the first thing too!!

I like ambiguity in books, but this felt like indecision.