I feel what you are saying, but I must have missed her composure. She was fighting and slaying hard like everyone else. She had to kill those able to kill her before she could move onto those who couldn’t. I don’t believe that she fully intended to massacre them, but that bell backfired and triggered the complete opposite of what Tyrion intended. He betrayed her and she betrayed him.Yes she was broken for sure. I'm not saying I didn't see it coming. How many times did they discuss whether she was like her father or nit. We didn't know 100% either way. I'm just saying it was weird showing her composed and only killing soliders for the battle and then once they surrendered, her going ape ****. If she had come out from the very beginning of the battle burning everything and everyone then it would have played better to her having snapped already in the previous episode.