@howalonnie She is the definition of greedy. As I have said, she could be protected and safe. The Emperor has vowed to protect her. Trashta is convinced that her position isn't safe because Duke Elgy (the spy) and Viscount whoever are lying to her to manipulate her. The Emperor has told her point blank he will do anything for her, especially if someone is threatening her and she won't confide in him.
And I just don't understand how you can read this when the premise is something you fundamentally disagree with. Like shit, I consider myself a socialist, eat the rich, down with the patriarchy, tits out for feminism, fuck the monarchy, all that stuff, but I can recognize when a story is fictional but is taking historical liberties. I just don't understand what you are expecting from all the characters. Trashta ran away from her slave life (slavery exists in this world for criminals, commit a crime, and you and possibly your family get sold to slavery), and for this crime she is being protected (runaway slaves get executed, they do not become concubines, this action alone is enough to throw the empire into chaos if it gets out, which Navier is keeping a secret to because she puts the empire over her pride, unlike Trashta), she is being given money, she is being clothed, sheltered, fed, educated, etc. But, what, the Empress is supposed to do more for her? She is already letting her live. I'm not saying I personally agree with the morals of this historical fiction, but I recognize the position everyone is in. Trashta is allowed to screw up over and over and we are just supposed to say, "it's okay because you were a slave."
I think you are seeing issues with this story that don't exist. It doesn't really have any tones of misogyny (more than is necessary given the historical context) and the classism is very limited. Don't think of Trashta as a slave or a pretend commoner, think of her as a criminal because that is what she is. Should we praise an escaped criminal who is living the good life and ruining an empire because she isn't content with her new freedom and "wealth"? Not to mention all the other crimes she commits while concubine...