I laugh when I see this post on Bug report. Such a salt moment. Shame... better luck next time.
Obviously, Harec outplayed you, but nothing else.
I did not think he could one shot the protector because even aura mortis, at a low forge level can give 272 damage in full charge headshot. (Level 2, Hero killer = 0, Quickshot = 5, Difficulty 25). He needed 3 shots to remove the protector's barrier. 6 shots or more are needed to kill him. So, tell me, how did the protector die?