“The good and the evil of this realm is not the same as that of the spiritual realm”.

Perhaps the soul needs to experience suicide. The drugs or dependence or anything else, even the voices, are just the pathways that can lead us to this experience. As the ultimate denial of faith, the only truly “unholy” (personal) act, that of the final negation of life, which is a denial of G!d, the Divine. It is, nevertheless and perhaps, that some soul has to experience this on their journey through this realm—which may not take only one lifetime. As it is said, “We can either take the long road through suffering, or the short, sweet path through the way of Torah.”

To propose that G!d punishes us, abandons us, if we commit suicide, is perhaps untrue. It is a valid experience contained in the set of human experiences and as such is not “judged” in the same way. For G!d’s judgement is not the same as human judgement. Think of infinite judgement as you would think of the infinity that is the infinite set of numbers. This is represented by $\Re$, the set of real numbers - and infinite set. No one considers this to be the set itself, but just a symbol to represent this particular infinite set—just as no one with any sense would think that the word G-d actually represents G-d, the Almighty, the Merciful G-d who released us from bondage.