I call that revenge suicide. Yes, I think like that, it is the number two reason, number one being to stop hurting. I want them to hurt like they have hurt me. I want them to have bad dreams about it, to feel massive guilt, to know it was their fault just like me. I want their lives to be lonely and without purpose, for their children and grandchildren, for whom they have worked so hard, to ignore and ghost them in their later years.
I have tried to figure out a way for them to be told I have died when I haven't. Or to even just wonder, "What happened to Mom?" And for someone to tell them, "You didn't know? She died months ago." And no, she didn't leave you anything. And sadly her body was found long afterwards, pretty badly decomposed.
But, they probably wouldn't care. So it wouldn't matter. And I wouldn't get to see it so that would be stupid, right?