I have to concur - I have zero interest in paying to see the Eternals specifically, if it turns up on a platform I am already paying for (or sharing someone else's account with) then I will spend an evening on it if the mood strikes me, but beyond that I have no interest in it.
I think for me the problem is a "why should I care" question - we have had scores of superhero origin movies and superhero movies where there is some nebulous world-ending threat that we know will be defeated, it is, the end, full stop, oh and here is a hook for this cool thing in the inevitable sequel.
Endgame/Infinity War was the culmination of this plot-type and it was more epic and personal than anything else Marvel can make on that level ever again, unless they do something really different (like the multiverse and crossovers - which is why Loki was received so well and why Spider-Man and Dr Strange are drawing such a buzz) the question really is why should anyone give a ****?
Honestly I am for one a little tired of each one of these cookie-cutter movies being peddled as the next "OMG EVENT OF THE YEAR, YOU CAN'T MISS THIS!!!!" thing from Marvel/Disney using their bottom of the barrel characters - just give people what they want, the new X-men, Fantastic Four - move into new genres like genuine superhero-horror like Blade, or try something really daring like Fox did with Logan - just shake up the polished forumla in a way that makes me give a **** for ****'s sake.
At the moment DC are being more daring and interesting and that is drawing them an audience despite the at-times spotty track record.
There - my old man shouts at cloud rant is over.