Eventually she came to believe that her condition was one that couldn't be treated medically; she was doomed to demand more decency and consideration from her fellow humans than they demanded of themselves.
In the excerpt from "Nature Girl" by Carl Hiaasen, the character reaches a point where she believes her situation cannot be fixed through medical means. She feels a deep sense of despair and acceptance that her struggles are beyond just physical treatment, suggesting an internal or emotional conflict.
She perceives herself as having higher expectations for how others should treat her, implying she believes she has a moral or ethical obligation to demand more decency and kindness than others typically give. This highlights her sense of frustration and disillusionment with human behavior, shaping her outlook on her condition and relationships.