You didn't know where you went wrong or what went wrong, with your knowledge about the novel, you tried to reverse the villain's mistakes and you succeeded; Magnus was now the emperor, but he chose you.

No one could avoid the cruel fate for you, no one could save you from the emperor's obsession.

Even if he desperately hugged you, even if he kissed you and declared his love for you in the darkness of his room, you were now held here, as he was in the past.