i just go the lazy route and powerscale everything, but even then the main trio are literally designed to be ridicilously OP to the point where it's not even funny
and there's also the fact that they get more and more apathetic and misanthrophic as the lore goes on (they originally actually helped the human race and gave them some of their OP tech), to the point where they just embrace the generic killer robot trope and go murdering in random dimensions and universe (they keep their world's humans alive though, because if they killed them too then almost one century of their help would have been for nothing)