As others have already pointed out: Without running the Game in windowed mode or through a very specific gamescope setup, the game freezes either directly after compiling shaders at startup, or when a single key on the keyboard is pressed or the mouse is moved by even a pixel.

Explenation for my commandline arguments:

• gamescope Run the game through gamescope
• -f The gamescope window is fullscreen
• -W 2560 -H 1440 The resolution of my monitor - replace this with your values
• -w 2559 -h 1439 The target resolution of the game window - **always use -1 of the previous values
• --force-grab-cursor Does what it says it does
• --mangoapp Optional, for the mangohud FPS / Performance overlay
• --backend sdl Required on my system for some reason, otherwise gamescope itself does not start
• -- End of the gamescope parameters, next is the command for the actual game
• env LD_PRELOAD="$LD_PRELOAD" Avoid this bug
• %command% The actual game