I lived with a suicidal single parent as a child, but she wasn't successful until I was an adult. My mum took her life in the epitome of the "selfish" manner, by jumping in front of a train. She left a brief note indicating that she didn't want to cause me any more pain. Her father committed suicide in the same way (when she was 14) and I don't think she was ever able to cope with it.
I don't feel that she was selfish. When she was well she was an incredible, selfless person who gave a great deal of herself to help others. She was very ill though, and her death was a consequence of her illness. I think she genuinely felt that she caused more pain staying alive than she did by killing herself.
However I was an adult when she died and I do wonder how I'd feel if one of her earlier attempts, when I was still a child, had been successful. I was bereft when she died but was able to find ways to cope (most of the time at least) with my grief, anger and at times overwhelming guilt. Had I been a child I wonder if I would have directed my anger towards her.
I guess what I'm trying to (somewhat clumsily) say is that while I would plead with anyone to be compassionate enough to understand that suicide is not a selfish act but a symptom of a terrible illness, at the same time, it is understandable why a child bereaved by suicide might see it that way.
It's like ripples on a pond. Her father's suicide led to her own, but I fight very hard to make sure it stops there. I have at some point to explain to my children what happened to my mum and her father, and I do find myself getting angry at times, much as I don't want to, because of the long lasting consequences of their actions and the impact they may have on the grandchildren she never met.