Your story is a rare one, from what I’ve gathered. Did your accident cause the mental problems, or were they caused by a problem with your brain?
I know an astute doctor who was working with a client with the symptoms of schizophrenia. She discovered he had an undetected gas leak in his apartment. When this was fixed, his symptoms disappeared.
Concerning the effectiveness and dangers of medications, you might want to read this Medium article. Also look at the site: madinamerica.com.
No one can legitimately argue with your personal experiences. However, to extrapolate this to others robs them of their experiences.