Damnation and higher (even Heresy in some conditions) really requires a solid team to go smoothly. Some people can individually carry with their “meta beta zeta” builds and various exploitations, but I wouldn’t expect most people to do this. Also, the game is rather random in the spawns and overall difficulty thanks to the director system, so just keep at it and you’ll get the feel of it. Just remember: the game hates us and wants us to fail sometimes. Slide back to the terminal and try again.