Bosses that hated your guts

So, I was doing a kara run with my warlock and we get to Moroes. We got him down easy, but one thing I found interesting. I was the one who got the garrotte every single time. That is the first time I have ever seen that happen. He apparently didnt care for getting smashed in the face with shadowbolts over and over. Have any of you had experiences where you thought the boss was picking on you?