I Don't Want to Be Embarrassed When I Become a Negative Supporting Character

I traveled through time and became a supporting villain, and I wasn't the kind of person who was finished in just three or five chapters. It's the kind of person who has been involved in the growth of the protagonist for a long time, who has been repeatedly abused and yet still survives with strength. It feels like normal people have to go crazy... This is a magnificent and vast world. The author spent three months imagining the outline of the world. There will be no brainless villains or abusers. The story is very complete and you can watch it with confidence. Because the world is huge, there has to be a lot of world introduction in the first ten chapters, so please be considerate. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.