The Creation War of the Black-Hearted Lord

The world in fantasy has become reality, countless time travelers have entered randomly, and wars between worlds with different rules have begun. The plot has collapsed, the protagonist has rushed to the street, and supporting characters have risen. The time travellers, aborigines, and strong men and forces from various worlds have fought and intrigued. All kinds of extraordinary forces intertwined and collided...
How come the kind, righteous, and sunny characters in the original novel become more selfish, sinister, and unscrupulous than the others?
This world is too chaotic and dangerous... After thinking about it, someone decided that all this was definitely not the problem of his world lord. However, for the sake of safety, he decided not to reveal his identity.