Hmm

I would say that the instinct of self-preservation doesn't exist on its own. It's just a consequence of other instincts. For example, if we didn't feel pain, we probably wouldn't be afraid to cut our finger. If the pain of life is stronger than the pain of death, as the survey suggests, then the instinct of self-preservation simply shouldn't work normally.

And do you think they drink or take drugs for what? Precisely to suppress this self-awareness. But sometimes, between sessions, there's a window when they realize the utter worthlessness of their existence. And instead of ending it, they go for another dose – that's what weakness of character is. I understand that you have high self-esteem, but believe me, you don't need to have a complex spiritual structure or unlimited intelligence to realize that you're at the bottom and that it won't get any better.

It doesn't take much intelligence to consciously or unconsciously formulate several disparate facts. Nor does it take much to derive the subjective statement "everything is bad" from them. But the next logical step, in my opinion, requires some reflection.
And yes, "intelligence" is not quite the right word here. It's more about a kind of self-analysis, things that are related, but not identical.