I see your point but as someone that read the novel please have faith in her, she has been a prisoner in her home for all her life and a year has not even passed since she arrived in anatole. It is not because she doesn't scream that she lacks determination, not evrybody has the same needs and personality. She will find and do great for herself. HAVE FAITH !
And please take into accounts her environment, we are between the end of Middle age and the Renaissance time and husbands could divorce their wife for every "good" reason like miscariage. Moreover, nobody told her she had one but her monster of a father so who should she trust ?
Once again making mistakes is human but the fact that she tries again is what shows her determination. For example languages, magic, castle management, stammer all that she has improved in LESS than a year.