Reincarnated as a goblin

I used to be a big gang boss. We were called the black tiger gang. we had it all: money, fame and were living the good life. One day, an enemy gang attacked and raided us. They killed all of our friends. They stole all of our things. They raped our sisters and then killed them.  Those bastards caught me and fed me to crocodiles. The last thing they said to me was "the strong devour the weak!". That phrase was embed into my soul. It makes me strive to become stronger. I vowed to come back to life, worm or God, and kill those bastards! To my surprise, I woke up and found out I had become a goblin. A skinny one at that. I trained hard, used all of my skills and took on the world. My aim is to become a god and kill the bastards that did that to me. They better wish they die before they meet me.