I kinda find it unfair to call his powers "hax" as he has zero magical power, for which he got mocked his entire life. So it feels like you're just bullying him now. Essentially what he does is neutralizing the opponents powers with his own, which theoretically makes them two regular persons. If Aster fights someone with barely any magical power, his swords would be little different from regular ones.
But yeah it's a given that at one point Aster and Yuno will be at the summit, one has a legendary four-leaf clover while the other a 5-life clover of mysterious origin. But what will define the level of this series, is how they will get there.
And Aster didn't do it alone. Yes he functioned as the spearhead, but you can't deny his two teammates had a substantial part in the victory. Also at this point in time Ichigo had already beaten Ikkaku and Kenpachi among others, so I don't really see an issue here that Aster was able to beat a single VC, in particular because we don't know how long they are planning to run this series.