Author lacks in very basic knowledge and replaces that with long chemical sentences and general confusion of other characters.
Manga challenges readers with more and more ridiculous ideas with each arc (it's hard to review this part without spoilers so here are some):
1. Village started by 6 ppl (at least 5 of them were fairly or very intelligent) 3700 years ago. (Forget about extinction caused by to small number or genes poll) They didn't develop anything, didn't use any of modern time devices and there is only 40 of them
2. Phones (communication) as response to enemies overwhelming advantage in numbers and individual strenght (even though mc already created crossbow in 1st arc and new ones could be much more powerful and even children can use crossbow pretty efficiently)
3. Rival wants to replace corrupted civilization with his paradise where civilization doesn't exist (resurects only muscles to create civilization based purely on strenght)
It must go worse with time but I already dropped it
