What's the point with that quite lackluster story in Endwalker?

[Lauront]

Remember the "mighty" Zodiark wasn't created to fight or be a weapon. It was made to rewrite the natural laws of the world and it did this just by existing. So us beating it at something it was never intended to when it was in severely weakened state isn't that crazy

I don't think this holds all that much weight, tbh. It's unknown whether he would've been designed to fight or not (I'd say we can surmise he could) and given the state of the world, one might think he could've been imbued with such an instinct. The more relevant factor is that he is a primal intended to be controlled by someone, i.e. Elidibus, who was absent at the time. His might isn't really in dispute, because Hydaelyn herself concedes that his power was so great that to defeat him she needed to drag the star into it too. Also, Amon was controlling him at the time.

[Zanarkand-Ronso]

I don't think this holds all that much weight, tbh. It's unknown whether he would've been designed to fight or not and given the state of the world, one might think he could've been imbued with such an instinct. The more relevant factor is that he is a primal intended to be controlled by someone, i.e. Elidibus, who was absent at the time. His might isn't really in dispute, because Hydaelyn herself concedes that his power was so great that to defeat him she needed to drag the star into it too. Also, Amon was controlling him at the time.

Well...no. I think they quite literally stated that the creation of Zodiark was to save their world from The Final Days.
Thats was the point of his Creation. Thats what he was meant to do. He wasn't made to be a Weapon.
Of course he was Powerful, he was a Primal. And there was just simply fear of what he COULD do if left unchecked. So as far as we know, he never got a chance TO be Dangerous.
Until DAMDaniel pulled a Zenos X Shinryu and took control.

[Lauront]

Well...no. I think they quite literally stated that the creation of Zodiark was to save their world from The Final Days.
Thats was the point of his Creation. Thats what he was meant to do. He wasn't made to be a Weapon.
Of course he was Powerful, he was a Primal. And there was just simply fear of what he COULD do if left unchecked. So as far as we know, he never got a chance TO be Dangerous.
Until DAMDaniel pulled a Zenos X Shinryu and took control.

Emet-Selch's own testimony confirmed they fought and fought. She confirms he was so potent that she could not suppress him without dragging the star into it.

If he could do all that without a controller, it stands to reason he was far from incapable of fighting, and given what struck their star, i.e. a weakening of the celestial currents but also out of control creation magicks spawning monstrosities, it would not be illogical to surmise this would include the ability to weaponise his powers. Or on the other hand, it might not have mattered whether his intent covered such a purpose or not, so much as he was able to make flexible use of his powers. Either way, he was demonstrably capable of it.