There's Something Wrong with My Heroic Spirit Simulation!

Traveling to a world with a dark background, where humans are reduced to marginalized races and bullied by various alien races, Yin Lian loaded up a system called the Heroic Spirit Simulator. From then on, he can travel to the past as various heroic spirits to rewrite history and save human civilization on the verge of extinction. But for some reason, Yin Lian always felt that something was not quite right with his simulation, and sometimes it even turned into a hostile race. "System, shouldn't I destroy humanity in advance?" "It's okay, please watch the VCR." … [You were born as a demon youth] [Due to your extraordinary talent, you were appreciated by the demon general at a young age and became his adopted son] [When you grow up, in order to thank the Demon General for his many years of upbringing, you decide to be filial to him] "I am a great man, and I am willing to be your adopted son!" "My son, Feng Xian, why are you doing this?!" "Shut up, old thief! You and I are at odds with each other!" [You honored your adoptive father and wrested military power from him] [You used Qing Jun as an excuse to send troops to the Demon King's City. In the endless civil war, the huge Demon Empire fell apart, and you received the title: Demon Jianchou] Yin Lian: "?" No, is this okay?