Villain System: Please, I'm Really Not the Sixth One

He was supposed to be an ordinary person working hard to make a living in a leather factory in the south of the Yangtze River, but he accidentally traveled to a world of cultivation where strength is respected. Like most time-travelers, the protagonist is accompanied by a system, but this system seems to be a bit cheating. He is a typical villain, Lao Liu, who not only confuses people, but can only be upgraded if he keeps cheating people. As a result, everyone from gods and demons to three-year-old children have been tricked by the protagonist. The protagonist makes great progress all the way and becomes invincible in the world. However, when he wants to go further, he finds that he has an inner demon because he has tricked too many people. So I decisively broke with the system and embarked on another path, but this path didn't seem to be easy...