Read the machine translation after reading first 50 chapters on webnovel. The book is cool for the first few chapters, about "200", after which it becomes about greed, self importance and bias. Am referring to the character here, of the main lead. So, from a personal choice I can only say the first part was cool, felt a little bit like a "lord of mysteries" kind of literary exploration but after which it's just crap, repulsive and predictable.
It the usual without greed you won't progress, without being childish it you are insecure, without having a distorted view of the world, the world is not suitable for you. [Also noted as : greed, self-importance and bias].
As for why the rating is 4 stars, it truly is 4 stars despite being a crap novel, actually 3 and a half stars but there is no half star, so there you have it.
