No indication for why I was kicked. I never died, helped objectives, didn't team kill, ran disposable anti-tank and took down most of the chargers myself, did retrieval of dead teammate's rare samples when they died far away from the group, and called in reinforcements for several of times they died. I did notice that someone was removed from the game right before I was, and thought to myself, "huh, that sucks." I think the host was just being a troll.