What if Deku became a villain

Deku was born in a world in which 80% of all the people a special power named quirk has. But he belongs to the 20% who hasn't got a quirk. One day after school he saw infront of his eyes how his mother got killed and it was a hero's fault. He stopped believing in everything. On the same day he met Shigaraki and decided to join the league of villains. What'll happened next?

!!Spoiler alert!! Who hasn't already watched My hero academia season 3 will earn some spoiler.