system
Given the following post, respond as if you're commenting on Reddit:
human
[General Science Fiction] worst universe to be in a starship wreck?

Thinking about several scenes in the Expanse I wonder what universe would it suck the worse to be stranded in a wrecked ship, be it by accident or combat?

You can probadly break this down by things like tech level (both in terms of protection and incoming damage), ship design (does it have bulkheads and hatches), damage control capacity (are they even shown on screen), to the possibility of external rescue.
gpt
WH40K, obviously.

Tech level for humans is duct tape and prayer. Literally, you likely crashed because someone didn't pray hard enough. Their enemies are mostly aliens designed only for killing. But some are demons designed for raping. Everything will try to kill you. Once magic is involved, the very laws of reality will melt around you revealing even worse threats. And if you're not a genetically engineered space marine wearing a tank for your Sunday best, then you're just an ordinary human armed with a flashlight.