So Infinity Ending is essentially a remake of Marvel : The End ?
Makes sense, it was a great story that didn't get the attention it deserved.
It's not that I don't want to believe you, it's just that the picture I linked (didn't know where it is from, just looked recent enough to matter) was surprisingly straightforward on a usually very nebulous subject, so it takes a similarly convincing later materials to really disprove it.
Thanos never really being Omnipotent isn't much of a surprise, as this combination would basically be the end of any story.
Still, power-level comparisons aside, the ultimate relativeness of TOAA's Omnipotence (only infallible within a well-functioning system) in the grand scheme of things seems open for debate from an in-universe perspective (minus WoG).
Unless TOAA really is just the personification of the people in charge at Marvel ^ ^