Fan Casting Animal Vegetable Mineral Man in Another Suicide Squad

A loser with a sad sack life. He tried to be a hero,but failed constantly. He tried to be a villain, and even that was a failure too. Nobody in either the hero or villain community respects him. He has no interest in killing, or fighting. However his body goes rogue on its own and starts attacking anyone for food or nutrients so he has to kill and fight to satisfy them. He hates this. Plus the animal part likes to snack on the vegetable and mineral parts, which then attack the animal parts in defense-including attacking his human head just for being in the way.