I think that our hopes and expectations of psychiatry and psychiatric treatment are often unrealistic.

1. There is no cure for many psychiatric illnesses.
2. Modern medical treatment for psychiatric illness often carries a price that is very high.
3. There is no magic physical "scan" that can confirm the presence of a psychiatric illness.
4. Even though intelligent people with a great deal of education and experience have attempted to standardize the classification of psychiatric illnesses, the laymen in one society can see things differently from the laymen in another society, and even within any given society there can be a divisions based on culture and other factors.
5. The chemistry of the human brain is one of, if not the most complex things about ourselves that we've ever tried to mess with. And, make no mistake here, the work that we've done in this area is still in its infancy.

Given all of this and more stuff that I've doubtlessly overlooked... I'd say that our doctors are generally doing a pretty good job.