Personally, I think that The Eternals could have worked better as a Disney Plus show (but hour long instead of half hours). It felt like they were trying to cram so much into one movie.

We were introduced to like 10 new characters, a world ending conflict, and the idea that there are sentient beings growing inside of our planet in approximately 2 and a half hours worth of screen time. They bit off way more than they could chew.

Also, things felt so removed from the rest of the MCU that I almost felt like this could have taken place in another universe within the multiverse.