Facing heavy scrutiny from abroad, Kim Jong-Un is an obvious answer. Starving his people food-wise and possibly culture-wise, while investing government funds on the sole purpose of destroying his adversaries one would argue it couldn't get any worse. But there's a dark horse. Licking crime by eliminating any physical embodiment of corruption, Rodrigo Duterte is not shy (rather proud) to admit he massacred a passer-by during his teens, the altercation "being caused by a mere glance".
So yeah, choose your pick.