Compared to humans, the Zergs' biggest advantage was in the number of Zergs who could enter the battle at the same time.
As for humans, not a lot of soldiers could enter the battle. After all, a normal soldier didn't have any advantage over even the lowest level Zerg. What humans depended on was technology and those super powerful people.
As for the Zergs, it was simply in their numbers.
They didn't need anything else, only their endless numbers. They could even tire a human to death if needed!
This was the Zerg race's most effective and also most terrifying tactic!
The tactic of winning through numbers!
"Think of a plan, I must think of a plan now!" Hong Dali's eyes were bloodshot. He was kind in nature, he came to this world because he saved two children disregarding his own life. Now, seeing that there were still four billion-plus people on Earth, how could he bear to watch them end up in despair and become food for the Zergs?