been skimming thru some essays and whatnot by David Smail, who was a practising clinical psychologist in Britain - I really like his breakdowns of the suspect incentives and broken assumptions underlying a lot of the practices and his overall takes largely resonate with me, since he passed in the 90s, has there been anyone else of note working in this kind of direction?
Foucault has some takes on how we treat modern mental illness/illness in general (people here don't like The School of Life youtube but its an okay summary imo) (approx 3:13-5:00)
You could also check out Giles Deleuze and Félix Guattari's book about schizophrenia and capitalism, but I haven't read it or know much about it. Short summary .