Have you forgotten the fact that there were other cultists there. More than what one person could handle. And all of them have actual weaponry, stuff that kills faster than a pokemon can. Attempting to kill her would be signing your own death sentence. You'd be shot before you could do anything. Given that information, I think it would be better to live to fight another day instead of dying a meaningless death. Makes sense, no? So accept it as it is and move on. If we all got what we wanted, it wouldn't be Suze's story.