Review Detail of ThunderRyu in Surviving the Zombie Apocalypse With My Military System

The Novel as many of other users said starts amazing. The author did a really good work introducing us to the system and the world the characters are living. But, the main antagonist is a Chinese system user that has a Harem with superpowers. The reason of my rating is that on later chapters where we get better weapons, one of the harem members gets ridiculously strong out of nowhere (she was already captive, sedated and weak from not eating) and goes ballistic, destroys jets and the newest armoury easily. So if she was this powerful before, why she didn’t do it before? Because the author wanted the MC to loose a battle, and I get it but it was to rushed and ruined all the story for me.