I've been trying to kill this moron for a half hour and I don't know how to do it. I've gotten him down to almost no health and then a prompt appears that says terminate then I press E then a QTE starts I get the some prompts that I don't understand what I'm supposed to do and then of course I can't kill him.
Use your S-Pressens to break his guard. It's the only thing he'll take damage from