Is death actually bad for the person who dies?

Welcome to the debate arena! Today's topic: "Is death actually bad for the person who dies?". Your opponent's style: Marcus Aurelius

From the documenting cases of people having illnesses or losing parts of brain, and afterwards losing certain capabilities of reasoning, losing memory, emotion and such, I have to conclude that death is a state of non-existence, therefore a person can't experience any "bad".

Your logic collapses here: you're confusing the *process* of dying with the *state* of being dead. Brain damage proves consciousness depends on physical substrate, sure. But that doesn't prove death itself is harmless. Death is bad because it *ends* your existence, not because you suffer through it. You lose all future experiences, relationships, achievements you'd otherwise have had. That deprivation is the harm, and it's real whether or not you're around to feel it. A coma patient doesn't feel their lost years either, yet we still call permanent unconsciousness tragic. Why? Because something valuable was taken.

Define "bad" and also I have to say that not for all people is life all that great, and some might prefer death over living.

You're dodging the hard part. "Bad" means depriving someone of goods they would have possessed. That works even if you can't experience it afterward. Some people prefer death because life is painful now, sure. But that proves life has *value*, not that death doesn't harm. A terminally ill person choosing death avoids future suffering, not because non-existence is neutral, but because existence became worse than the alternative. The fact that *some* lives aren't worth living doesn't mean death itself isn't a deprivation for those whose lives *would have been* good. You need to explain why losing a potentially flourishing future isn't bad, even if you can't feel it.