Ran into this, it's just unbelievably sad.
"I never properly grieved until this point" - yeah buddy, it seems like you never started. Everybody grieves in their own way, but this doesn't seem healthy.
You have two deaths the death when you no longer alive physically. But you also have a second death when the last person will speek your name or the last person who knew you also dies. This may in a hacky way create a third death. The last message that your post mortem avatar speaks like you. What have we released into the world. I hope this guy can handle the psychological experiment that this is bringing us.