It's not exactly a 'Netflix-Original'. Started out as a joint production between Universal and Legendary Films with a budget of 70-million. After completion, Universal wasn't happy with it, Legendary didn't like their feedback and they had a falling out -- the planned 2016 summer theatrical release was canceled. Chinese-owned Legendary Films shopped around, Netflix picked it up as an already finished movie and branded it a 'Netflix-Original'.
Not awful. Competent, experienced cast; OK story and decent effects contribute to a production that had some budget to work with. A few plot-holes here and there, like beings that can fly over things, yet laying iron shavings on the ground provides a barrier of protection because they can't step in it. Contrived ending, and, so what if they kinda-sorta borrowed a central plot mechanism from the 1995 anime movie "Ghost in the Shell" https://trakt.tv/movies/ghost-in-the-shell-1995 -- it's an enjoyable watch... :-)
Watched it earlier today. We all liked it. Was it the greatest sci-fi movie? No. It was entertaining though. Yes. The action scenes were good. The ending was good. A completely different take on where I thought it was going.
Cinematic Eternals is lightly based on the comic book of Jack Kirby, perhaps the most important man in American comics, from whose pen the Fantastic Four, the X-Men, the Hulk, Captain America and hundreds of other superheroes were created. heroes of the Marvel Comics universe but also of DC. And i say lightly because for the sake of the lgbtq+ MESSAGE, the nationalities, genders and sexual preferences of all the heroes CHANGED while others were "created exclusively for the film" such as the hero Phastos. These money maker companies need to learn to respect the artist!