I opine that we humans increasingly shape our living situation such that it causes friction with our nature, our primitive psychology and biology. This friction causes increasing unhappiness. When I first realized this in my early twenties I was able to vastly increase my happiness (up to a bearable level, luckily) by removing many such man-made unnatural aspects from my life.
However, I expect that the ability to remove oneself from or avoid man-made degeneracies will be extremely difficult or impossible in a matter of decades. Even my unborn children I love too much to force them into that.
Given these expectations I consider it selfish to the degree of evil to have children. Mind, I do not consider it selfish or evil to have children. Only if you do it with the expectation that they will live in a virtual hell.
I do generally enjoy life, spending time with friends and family, working on a project I am passionate about, pursuing interests, making an effort to be healthy. However, I expect that the degeneracy will increase to a point where a person's happiness would be net negative.