The server-side dictating your attacks is probably one of the biggest complaints and issues with the game feel right now. It’s a system that feels bad to play with.
Attacks are dictated by the server-side, meaning player attacks can hit an enemy and the server decides whether it hits or not. Leading to a lot of instances of hitting/missing enemies and the server deciding the opposite.
Clip of phantom hits
A clip of the opposite of a phantom hit, missing an enemy and the server deciding it hits.
That's just two vids, there's a lot more to evidence this problem
And many more clips I deleted because it just became too much.
And a YT vid showcasing the issue because a lot of other people have been documenting this.
Hitreg in Warhammer 40k: Darktide. Or lack there of... - YouTube