That doesn't make much sense considering doomsday killed Superman and Superman especially old Superman had Omniverse levels feats casually flying through the Big bang was not affected fought Darkside who has the power to erase you from existence Dr Manhattan could not erase Superman Superman has demonstrated many more feats of power over the years in each version of Doomsday is strong enough to kill him now if you are talking about dceu doomsday then I can see how you came up with the outcome what if you are talking about doomsday from the comics there is no excuse
Superman: hold on, are you a child? Ben: hey, I'm technically an adult! Superman: oh son why are you picking fights with gods across the Omniverse. Ben: they started it! Superman: really ( ⁰͡ Ĺ̯ ⁰͡ ) Ben: They were arguing I wasn't powerful like them. Superman: son there's more to cosmic power than just winning arguments. Ben: Ironically that's exactly how Serena & Bellicus's cosmic power works. Superman: and you lead them to co-operate by example? Ben: yeah Superman: Isn't that ironic! Ben: Yeah, I guess you're right. thanks for the chat sups. Superman: anytime kiddo. Ben: I'M AN ADULT!
Feats are for the ultimate Humungousaur, with one punch he made a mountain tremble, almost equaling the strength of Way Big who carried a weight greater than that of the moon, apart from that he comes out unscathed from Way Big's attack and He is the most powerful 3rd supreme of the Ultimatrix