The Undying Hero-Nomu Deku

The day he was diagnosed quirkless was the day his first foot was put in the grave. A year later when his father failed to get a promotion and killed his mother in front of him was when his first arm gripped the coffin, and when his father sold him to some man called The Doctor was when he was finally dead. 8 years of torment, and torture, if not for the artificially gifted quirks he had been given he would have died over 1000 times, and when he finally escaped through sheer luck, and knew he had nowhere to go, that was when he crawled out of the pit he had been buried in and began to try to find a new way of life.

Warning for readers, I gave Izuku some pretty gross powers and if I manage to actually write the full story he is gonna be using some very gross visceral powers so if you don't like descriptions of bones shattering and pus spraying I suggest you look elsewhere