I think it's because of RETVRN fascism brain lmao, the older = the better for them, and i think primoridal is supposed to be the primoridal gods of greek myth, which are older than the titans and therefore even more RETVRN. i guess they think greek mythology is some anime shit where the older a god is the more powerful they are despite that as you pointed out the titans got fucking BTFO'd by the gen alpha olympians

as for the military ranking shit, i think i figured it out, it's that captains and generals are on average older than soldiers, and commanders are like bronze age mythology RETVRN version of generals, and warriors existed before military formations did so they're the ultimate RETVRN