Charming attitude.

I doubt that many suicidal people have anything much to atone for, more likely they had some horrible things done to them or are just wired in a way that makes them deeply unhappy.

I don't see suicide as brave or cowardly. Depending on the situation, suicide can be in an individual's best interest -- a terminally ill patient in extreme pain who chooses to undergo a painless physician-assisted suicide would be a good example.

Even beyond terminal illness, I imagine that there are some people who have either been through such massive trauma, or are wired so badly, that suicide is a better option than living in misery. Granted, depressed individuals may not be capable of making decisions in their long-term self-interest, but I still wouldn't condemn every suicide as a "bad" decision, let alone "cowardly", "shameful", or any of the other pejoratives that come up around this topic.