I hate this MC. This is the problem. This is not a game. would anyone would kill someone that you know is and was forced to a game. They are not characters, they are real people. I think that is the dilemma the MC is having, but the author is forgetting one thing and the MC can see it even without actually knowing or seeing. The player playing as the main is crazy now. She must have been playing in this world for too long and considered that everything was possible. The moment she did something wrong the MC was brought to the world. Her mistakes brought an outcome she didn't consider. Now, she can't think right and is getting crazier than ever.
MC , somewhat, realize this so the ultimate thing is to kill her. The only reason why the MC is not killing yet is because Etten still loves her. The program told her that she needs or at least that is how I understand it, Etten is the main ML if he hates her she is doom. She needs to have a high affection for her before she kills the other player or her life is done for.