Boring, thats all I can say. The apocalypse is not exciting, its a very bare bones basic, monsters (called demons for some reason) invade earth, kill them for exp and materials, The 'system' is honestly just a status screen if you ignore its ability to upgrade the mcs power. The mc even though he was apparently abused and bullied his whole life is somehow some kind of sociopathic manipulator without any development or explanation. I had to start skimming after ch 20 because I felt like I was wasting my time. The author also has a habit of making his mc speak far too much during fights, just blurting out whats happening to him instead of doing something about it. However, despite all this its still one of the better novels on this site.