I'm a chronic depressive, although I've made great strides over the years with therapy. I'm in a better place, more or less, now, but there's a clip from that movie that's outright horrifying to someone trying to get better. I used to have a webm but I can't find it.
Basically, Nicholson storms into his shrink's office during a session and demands answers and therapy and the shrink tells him, gently, to GTFO. Nicholson stomps away, heading for the door, when he suddenly stops and looks at all the patients waiting to see the doc. He says "What if this
is as good as it gets?", then walks out, leaving the other patients to look uncomfortably at each other.
I know that feel. It's a bad feel. It's the feel you get when you work hard to get better but you still keep repeating the same stupid patterns like a broken windup toy.