As soon as close combat began, the Ante People began to gain the upper hand.
It wasn't because the Ante People were larger in size, but because the stopping power of the guns in their hands was higher. The Prussians were specifically assembled assault teams, equipped with MP38 and MP40 submachine guns shooting pistol bullets; unless a fatal hit was achieved, the target would mostly continue to move.
The weapons of the Ante People fired reduced-load rifle cartridges, causing huge damage no matter where they hit, putting a Prussian soldier down with a single shot.
This was crucial in close combat because everyone was at close range and whoever had higher stopping power per shot had the advantage.
Yes, in close combat, both Ante People and Prussians would shoot whenever they got the chance.
Additionally, the weapons in the Ante People's hands were heavier and extremely sturdy, proving exceptionally effective when swung as melee weapons.