“life is of negative value, and that the will, ignited by the knowledge that non-being is better than being, is the supreme principle of morality”.

(Disclaimer: not trying to start a fight, I’m just genuinely curios about your perspective of this)

I don’t really accept that anyone truly believe this besides truly evil people, “truly believe” here being “lives according to the philosophy”.

If this is the conclusion for people, wouldn’t the “supremely morally correct” thing to do being to end as many other people as possible before ending oneself?

Life being meaningless because of the vastness of space and time also feels like it’s just a matter of perspective; we’re not significant from a cosmological perspective but why would that matter? We are from a human (/individual) perspective.

You probably don’t matter in the perspective of even human history, but you matter a lot to the people around you, and might even have had a crucial impact on someone who was just a passing connection.