Can you try disabling your anti-virus as well as your firewall.

Dont launch the exe directly. You need to go through the launcher or it will fail anyway.

Could you try everything here, please?: https://support.fatshark.se/hc/en-us/articles/7709665369501--PC-How-to-Resolve-Darktide-Launcher-Issues

NEW POTENTIAL SOLUTION ADDED TO: https://support.fatshark.se/hc/en-us/articles/7709665369501--PC-How-to-Resolve-Darktide-Launcher-Issues

1. Remove the gpu_detection.dll in the ‘launcher’ directory:
   Steam\steamapps\common\Warhammer 40,000 DARKTIDE\launcher
2. Proceed to launch Darktide as normal, via Steam

Is anybody available now to do some over-Discord debugging with one of our lovely developers?