So Universes being weaker than the whole, means that AM didn't absorb the entirety of a Universe each time he spread the Antimatter force further?
We also don't know how powerful that "whole" was..... So it's faulty logic to try and demean AM's feat in that way...
Bottom line.... Spectre himself was "amped up", he was so powerful that he saw concepts that not even God had dreamt of.... Yet he still couldn't kill AM...
So if an amped up Spectre couldn't kill AM, you must also think....
A single Universe > Spectre as well, or else you're preaching a double-standard.
As said, those one DC-Universe would equal the Marvel Omniverse (or Multiverse back then) in power. Each one of those splitted Universes, though weaker then the complete DC-verse, were as powerful as the Marvel Universes. Jut take a look at the heroes from those other Universes .
LT/Scathan the Approver defeated Protege. I don't believe LT is lazy. I am Guardians was cancelled before the rumors swirled that Scathan was a Beyonder. He's a Celestial. Very powerful one. Celestials cannot die