Because she sacrificed a lot of people in her journey to 'protect' the country, and when the prime minister cut her off, she felt betrayed because she also help to protect the country (although she might not realized what she had done is wrong) (︶︿︶)
Seems like the villain girl was betrayed by the tamer and prime minister. Hope they can explain what's it about and if it's for a petty reason or not.