Listen, it's not my favorite MCU movie by any means, but I enjoyed it! I definitely don't think it deserves to be on the bottom of most MCU Movies, Ranked lists. (And hey, that's another thing Captain America: Brave New World gave me -- a movie to slot lower in that ranking.) Personally, I think it's one of the more enjoyable MCU movies to come out since Avengers: Endgame.
In case you decided to skip Eternals for whatever reason, here's the quick summary: A group of seven superpowered alien individuals have lived on Earth for thousands of years at the order of their godlike alien boss. Their job: exterminating invasive entities known as Deviants. After supposedly finishing their mission, they're supposed to be summoned back to their homeworld, but that doesn't happen. Five hundred years later, they still haven't received their next directive, and they've gone their separate ways. Then a Deviant attacks, and they must come together to figure out what's going on.