So called mental illnesses are, at least in my opinion, product of an ill functioning brain filter. Usually your brain is able to filter out distractions, such as shadows (which can be seen as people, monsters etc. related to former experiences), but in cases of shizophrenia, depression etc. this system probably is to sensitive and therefor a system overflow of unnecessary information happens. Your brain shuts down, running like a snail.
In fact we don't even know a lot about the brain and how it functions. Be aware that you are a genuia pig testing medication for the best outcome. Especially antipsychochtics shut down a lot of neuronal pathways working over your neurotransmitters, such as serotonin and dopamin, leading to a "quiet" brain. Emotions can be dangerous and are therefor the tribut you have to pay, if you do not learn to accept your illness. This is the most important thing: To learn how to live a life with these conditions. For example people losing legs or arms (etc.) have to get used to their new conditions. But as you can see there are lots of people taking part in special olympics and living a meaningful life. Taking meds to function and not working on your conditions won't do the trick.
Your worst enemy is yourself. It is not somebody else hindering your progression but yourself. After fighting my depression and psychotic episodes drugfree I can finally say that I am on my back to a quality life. Find inner peace and you will be at peace. I am not sick and never was. Maybe I am a stranger walking my own path, called crazy for my worldview, but I am glad to be different. Terms such as sick or crazy are unecessary in a world full of individuals. Nobody is normal. Everybody can do it with dedication, with or without drugs.