I think the attitude of society, the stigma, contributes to the unwellness. The stigma is not confined to general society, but exists in the mental health profession to some extent too. I think inability to tease out what causes "mental illness" contributes to unwellness in patients and to their demoralization.

I have in mind something like this: at least some people have written that Freud discovered the sources of mental illness in the "maltreatment" of his patients in their early childhoods -- to the enforced repression of their emotions and thoughts. But this "discovery" of his was received badly by his society, and he could not stand the disapproval he found. As a result he reformulated his theories to put the onus more on the patients themselves than on their experiences.

I am not sure what is being done! If it is the growing realization that mental illnesses are related to childhood trauma, then I think that is good (because I think it is accurate). If it is that medications are being seen as the answer to everything, then I do not think that is good!