Drugs, binging, neglect--they're all forms of self-harm. The point you make about expanding the category of suicide is an important one--it's exactly what Fulton Sheen warned about seventy years ago. Those "1000 moments" you describe, the ones where they felt "less-than" constitute the exact type of suffering we see today. I was curious about this topic, and when I consulted the statistics, it's shocking just how prolific the mental malaise is today.