I think both. Though I think in an ultimate sense life (meaning that which is alive) is good. And I also think humans were perhaps meant to have a different way of thinking or culture, one which wouldn't engender and perpetuate such commonplace selfishness, nastiness, fear, anger, etc. And if not "meant to" then at least we have the potential for it.

How does being good in an ultimate sense square with being both good and evil by nature? Well, I suppose nature and real elements of it exist on more levels than the ultimate. Evil is a real energy and motivation and state of mind and hence is an aspect of one's nature, but perhaps it's based in ignorance (in the sense of unawareness or inexperience) which is itself not intrinsically evil, or perhaps it's a side-effect of living a relative existence as a partial version of one's real ultimate self, perhaps for the purpose of having a contextual experience and a specific path/journey through the universe.

I would also mention that evil is a subjective assessment, what's evil to one is not necessarily evil to another. I, for example, find corporate CEOs generally evil but not Hitler. How does that square with evil being a real thing? Well, that thing that one sees in someone and calls evil according to their own model of the world or morality is a real thing (except when it's not).