I'm kind of impressed by how people are either biased towards Medea or Psyche. They're both pitiful in different ways, Medea worked all her life, had most of he accomplishments stolen from and lost people she truly cared about and Psyche was gaslighted and manipulated probably from when she was born.
They both deserve to be happy. That said, even putting spoilers aside Medea isn't going to die. If Psyche's body dies then the prince's plan will succeed and Medea's body will be next on the chopping block, and this doesn't seem like the type of story that will show us all our leads struggles just so that the bad guy wins in the end, use your brains people.