he didnt lose by getting punched he lost by being inside an underwater base while it was exploding the punch just knocked him into the lava and that didnt do crap to him nemesis is awesome but ustanak is just insane.
Ustanak will never be Nemesis. He's below. Nemesis followed you EVERYWHERE. In halls, outside, at the church. And once you get him down, he gets right back up and comes at you 2 rooms later. Ustanak followed you, but to an extent. His appearances weren't random like Nemesis, it was planned. It was always a "Boss". He didn't appear like Nemesis did and he got nearly punched to death. Punch Nemesis like that and watch him smack you across the room.