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

bad for his consciousness after he dies it doesnt matter to him

You're smuggling in a massive assumption: that the person's consciousness persists to experience the badness. But if death ends consciousness entirely, then yes, nothing matters to him afterward. That's not an argument death isn't bad, though. It's an argument death is bad *precisely because* it eliminates the person who could have experienced good things. The harm isn't in posthumous suffering, it's in the deprivation of future goods while alive. You've confused "he won't mind being dead" with "death isn't bad for him." One is trivially true. The other requires you to explain why losing decades of potential experience isn't a genuine harm.

it depends on how he lived his life

That's a cop-out. You're abandoning the metaphysical claim and switching to a prudential one. Whether his life was good or bad doesn't change whether death itself is bad for him. A person living miserably still loses potential future goods by dying. A person living wonderfully still has those goods stripped away. Quality of past life is irrelevant to whether premature death harms him. You're trying to make death's badness conditional when the core question is whether deprivation of future experience is intrinsically harmful. Either death deprives us of goods or it doesn't. His biography doesn't resolve that.

i dont think death is a bad thing because in universal scale it is so insignificant,it is inevitable we cant do nothing about it

Insignificance and inevitability are separate problems you're conflating. Gravity is inevitable and we can't stop it, but it still kills people. That doesn't make death good for them. You're also committing a logical fallacy: from "we can't prevent death universally" you conclude "death isn't bad for individuals." A meteor heading toward Earth is inevitable and cosmically insignificant. That doesn't make it not catastrophic for those in its path. The fact that death happens to everyone doesn't erase that it deprives each person of their future. Inevitability doesn't negate harm. It just means we suffer a universal deprivation. Why does something's ubiquity make it good?