There is calculations for Godzilla as well, and more importantly on screen feats to compare them with. And canon tie in comics. Godzilla punched King Ghidorah with as much force as most of DD's punches combined through the entire movie.
Godzilla drains DD of energy as he and other Titans excel at that. DD only gets it when attacked. Plus Godzilla has much larger well to draw from to begin with.
He simply physically beats him to death as every single physical force that was exerted on him, or force that he exerted was magnitudes and levels above anything Clark or anyone in the DCEU has done. These aren't even comparable as Godzilla existing is more weight than both Clark, DD and Wonder Woman have supported above their heads
ON SCREEN combined. Clark SUCCESSFULLY lifted an Apartment Building and a Space Shuttle. He was unable to fly the ship and unable to support the tower. By scaling DD would be slightly above. Godzilla wouldn't even notice he had completely obliterated those said objects when he stepped on them. Two different tiers of strength and ability to apply it due to size mainly. And yes, If DD or Clark were his size I think they would be stronger. Even if strength is limitless, the ability to apply it in a meaningful manner isnt. Clark can fly. DD can't
Straight up energy/power limits- not comparable. Godzilla has absorbed and exerted more energy in a single blast than DD or Clark for that matter ever got hit with or exerted in their entire career with any form of explosive,HV, or energy blast. His core temperature pre fire/mothra power up was 168,000 something degrees. Any calcs for HV?
The only feat DD/Kryptonians have to compare is a newspaper article about a tectonic plate and possibly escaping an artificial singularity that Lois Lane tanked. And a NLF for DD which works against people like Hulk but since Godzilla has tanked and absorbed a much much bigger nuke than Doomsday it's useless.