What is or was the worst part about your depression?

For me it was my fear of everything. My depression caused a GAD and it stopped me from sleeping for days upon end. I would fear death, food brought me no joy, to the point I lost 20 pounds.

The worst part was fearing that my life was pointless, I would die and all that would be left was my rotting corpse. And nothing else. No after life, just darkness.