It is definitely better than most mangwa out here but isn't good.
1. System doesn't have any clear rules. Players are able to use weapons in reality but somehow no one does that.
2. Weapon and armor designs are trashy (there is no need for explanation on this point).
3. Serious plot armor. In one page MC says that he needs better weapon to survive, in next one he gets legendary sword.
4. MC is serious pushover when author tries to depict him as somewhat heroic. Basically contradicts himself. Was robbed and he basically thanks for that (chapter 9 and 10)
5. Power levels are all over the place. Veterans are about level 8, MC almost reaches that level in few hours.