I have no issue with multiverses. I have trouble with infinitely branching “everything that can happen, does” multiverses.
There are infinitely many universes Thanos did the snap.
There’s an infinite subset where Thanos decided 51% was the right number to eradicate.
There’s an infinite subset where he decided to do the snap along every potential kind of eugenicist line.
As a separate issue, the MCU is collapsing under its own canon. I forgot how much She-Hulk’s finale added to the canon of the MCU. Either season 2 episode 1 fixes that, or we never see She-Hulk again, like the Eternals’ head.
So. The Eternals’ mission, know it or not, was to elevate humanity’s population to 7 or 8 billion. We’ve not noticed them before because nothing in any of the earlier phases threatened that.
A quick scan through the titles suggests that Ultron should have been on their radar, and Thanos should have been on their overlord’s radar.
If it were a standalone story, it’d bother me less.
