While I do believe our understanding of how the brain functions still has a long way to go, which includes treatments for mental illness, there is something to be said about acknowledging more the external factors of our modern day lives that fill us with so many problems.
Personally, realizing where I have "disconnected" from people, values, and truly human experiences has been a large step forward in improving my mental health. I hope it's something that others who feel so many emotional challenges can try as well to see if they can make progress with their own mental health.