the timelines dont make sense for pure evolution. Not just human evolution, other species as well.. Some of the specialized evolution doesn't make sense either; earlier non-funtional versions would have served no purpose and should have been bred out rather than refined.

we're also just a little too well adapted, or our environments are too well adapted to us.

it seems to me more likely that an intelligent species either terraformed this planet, genetically designed early humans, or both, leaving us here (or not) as a functional creation.

We've done the same with chickens, cows, various plants, although on a less advanced scale.

this theory ties in well with various creation myths, pre-historical visitation myths, etc.. I also don't think humans were necessarily the first intelligent-ish species on this planet, or in this solar system.

Annunaki are one of seversl plausible possibilities, but I don't really profess allegiance to any particular explanation. That might seem like an AI answer, but I just see it as remaining intellectually honest and open to many possibilities.