Don't people realize that when we fight Zeus, he's massively gimped cause he's trying to maintain Olympus running and that when he actually starts pouring more power into himself and starts removing limiters, there's so many interferences from a bunch of people that we don't get to see something even close to what he can do. Case in point, nigga literally has a anti concept ability (whcih we get an explanation of how it works through Chaos's ability which should be the same thing only on a smaller scale on Zeus's part) , which means that he takes Mustaches's badly written Lawlmighty , shines it really good, then turns it sideways and then proceed to shove it up his ass. After this point, Yhwach is literal fodder.