For a sort of counter point, there are a lot of things that go through a person's mind before they end their life, and we may never know most of those thoughts, "selfishly" wanting out of bad times may be one of them, sure, but another is the feeling like nobody will care. A voice in the back of their head that says "nobody will miss you". Calling that act selfish only proves that voice right, and is a final disrespect to someone who died too soon. Chances are they believed nobody would be hurt, and that's just one of the many breaking points that caused things to play out as they had. There's no good in taking your own life, but making someone feel bad and guilty for feeling that way just makes things worse.