People who have grown up in a culture of religion assume that there’s nothing but pain in atheism, when actually it’s quite liberating. The intellectual honesty of atheism is simple, refreshing, and empowering. I for one have never been more at peace with myself.
It turns out that fearmongering about death (eg. most religious teachings of an afterlife) perpetuates the fear of death. Atheists must make peace with the reality of the universe and when they do the fear simply goes away.