First of all our perceptions on things such as death, injustice and children is projective. You need to realise that your reaction is a construct not logical or even justifiable by the actual issue at hand.

Secondly, I think the Buddhists have a great understanding of life and impermanence(upon which we can build with our post existential understanding of life). Beyond the judeo christian(and muslim) metaphysical carrot and stick morality structure, life is challenging, painfull and unfair. So death, nonexistence is a great finality to it. But that creates a very upsetting premise for western thinkers that need life to be more, because without it a lot of western values would destabilize society, culture and a individuals everyday life.

Nihilist has a bad rap because of this, just like anarchy(real anarchy, not the koobaya modern iteration), atheism and other rejections of collective delusions, the cognitive exercises they engage in are toxic both for society and the individual because it corrodes a lot of fundamental premises that modern western value structures need to survive.(kinda how humanism cripples religions or nationalism)

Fundamentally I think you need to internalize skepticism. I think a lot of atheists are so focused on the external factors that they don't self-criticism and restructure their own beliefs. Even this query is basically a way to find external reinforcements to solve a internal dissonance. You still have the need for a God-like ethical bookkeeping, you still hold on to a cultural bias despite renouncing religion. You need to know that death and suffering isn't random. You need to get assured that morality is not in vain in a fundamental "law of the universe" type of way.