Originally posted by MindsetDoom did succeed only to be tricked by Klaw's guile making him a complete dupe by the Beyonder.
Doom succeeded when he had Galactus power, an incomplete Doom wasn't able to handle Beyonder's power. Because Akhenaten was aware of Doom's plan because he was on Earth, not out in space, Thanos would have gotten his shit pushed in as well, bud.
Doom's plan didn't work anyways it was moronic and never would have worked. So in both scenarios Doom failed. Thanos succeeds where Doom fails. They aren't even on the same map.