He was enhanced by the divinity machine giving him abilities comparable to gods, infinite stamina strength and invulnerability, also his burning anger coupled with his power allows him to continue to gain strength until his opponent dies, so tldr he will get angrier until he kills what he’s fighting which means he literally cannot lose a fight, regardless of what it is

He was given divinity after the events of doom 2 hell on earth, dol enterals second dlc reveals an angel gave him god like powers. Long and short he’s pretty much a god