If someone thinks that achieving goals, having fun, or getting things is a good way to live, that one is wrong. If something is useless, everything that involves it, is useless, that way is life, if life is meaningless, everything it involves is meaningless too, even death (back to suicide, it has no sence).
Arbitrarily deciding what make sense or what has value on your own personal scale, hmmmph! People live and find out what's worth living for them. To say, "but that's just so&so's sense of view" and brushing it off as wrong or unimportant is very egocentric. To say it doesn't matter because it "ends" is egocentric too. A story book has an ending, but the ending alone doesn't describe the value of the book as a whole.
I hate the whole Existential nihilism bullshit because it's basically all subjective reasoning(a fancy way of saying opinion). What it is trying to do is say my opinion is better than your's. In Fakku terms:
Person1: (Eroge company of your choice)'s visual novels are all worthless garbage.
Person2: *Fapfapfapfapfap*
Yeah, me dismissing the idea of "everything being useless" is subjective, but at least I know it is.