How do you live in this world - filled with wars and chaos - with no hope of redemption or things getting better, and just thing “yep, this is all there is, life is good”. As Christians, we have assurance, certainty and comfort in that Jesus is coming back to judge the world, destroy all the wicked and bring us to eternal life. Atheists don’t have that. Even worse, some even prefer to insult this God. What’s keeping me grounded in this life is the knowledge that God dictates when my life ends- not me.
You are straw manning again. Death being the end makes zero difference as far as hope and justice go. Arguably it drives you further to accomplish those in life rather than just rolling over and waiting for some being to turn off your lights.
You will never accomplish them.