There are a range of people from altruistic to greedy sociopaths. And few if any are so simple that “good” or “bad” is a sufficient descriptor.
Humans evolved to be cooperative, on average, only to such a degree to enable us to survive. On the surface we can mostly not maim and kill each other enough to work together on things.
But we have many competing motivations and instincts. We aren’t far enough removed from our violent ape ancestors to my taste. As one can see by reading the news on any given day.