What to Do If You Travel Through Time and Become Mentally Ill

Yu Rangchen, a time traveler and suspected psychopath. He is more than 20,000 years old and still holds a grudge. He is bored and ready to return to Earth to seek revenge. It turns out that I accidentally crossed the wrong boundary. What? Is the original owner a psychopath? Fine! My mind is not right either. What? Travelers in this world are common. Uh... That's acceptable... What? The original owner also has a system plug-in! What the hell? Does such a thing really exist in the world? How come I haven't seen you in this long life? All right! These are all acceptable! It's just those Jindan-level guys out there. Why do Fa Tianxiangdi have Gundams and variable fighters? Having lived for 20,000 years, Yu Rangchen felt that it would be better to have more life experience.