I've been through some very desperate times, much like MRD. Everyone thought I had clinical depression, so I was getting treated for it, and after a few years it turned out to be Bi Polar Disorder. The Episodes of absolute Mania in itself actually made it much more likely for me to carry through with an attempt, as opposed to being depressed, which actually just makes you think about it more than anything.
In the long run, after you get your leg crushed by a truck, a brace you have to have to wear for 9 months, some 90+ stitches later and a left foot that makes it quite painful to run (even though I do, so I have to just bare with it) The idea of killing oneself really makes the whole episode much less pleasing to the palate. I've never really forgiven myself for traumatizing the guy who hit me, even though I must confess I was a just a dumbass sixteen year old with some severe problems. The Truck Driver has since forgiven me, and was just glad I was alive and relatively intact. Plus, as I've found out, life does get better. Not necessarily for everyone, but I'm not sure if that is either the minority or majority.