I think the word "heresy" gets thrown around too casually. Aside, I'm sure my other thoughts are well known by this time. My primary critique of psychiatry is that meds are often seen as a cure-all, pushed too early in place of other things that should be ruled out first, and diagnoses are not always accurate to what is actually going on.... which doesn't mean they don't exist at all, just that patients and clinicians both should be doing better to identify issues.
I don't agree with all the official diagnoses I have received, and I did go through a few before finding my true issues. I was diagnosed, for instance, with "generalized anxiety", when the actual issue was sensory processing issues creating anxiety-like symptoms.... autism, not anxiety. And it's actually super common for autistic women to be misdiagnosed with anxiety before autism is considered.
My official diagnoses: major depression, generalized anxiety, OCD, ADHD, autism
What I agree with: depression (seasonal though), OCD (mild and connected to the autism as similar brain structure has been found between them), autism
What I also suspect may be an issue: BPD or similar behavior patterns, dyscalculia (a learning disorder)
And accurate diagnosis, treatment, medication, etc. These things take time. If you have clinical depression, you're not going to feel better or even find the right treatments (meds and other therapies) over night. It's very much trial and error. It can take months or years.
I would also put forward that while scripture does mention things that sound like depression or anxiety.... depression and anxiety are normal except in certain instances where they are excessive. And even when excessive, there are many, many different possible causes. Scripture may have some general thoughts on it. I have a devotional for depression and anxiety that gives verses to meditate on, and I find it very comforting. The Psalms speak to many different human emotions and when I'm not doing well it helps me to feel less alone. Scripture doesn't have advice, though, for every possible cause, and it's not wrong to look for extra treatment when these things become unmanageable.
Anyway. I'm gonna go take my little cocktail of psych and diabetes meds.