To disable the 2K launcher, create a bash script (such as "bioshock.sh"), from which you will launch the game:

#!/bin/bash

$SHELL

Remember to make the script executable. Note that you may need to adjust the 12 seconds slightly depending on the speed at which your system goes through the usual launch process. If the kill command comes too early or too late it won't work. Very hacky solution but it launches consistently for me now, and the game runs perfectly. I did notice settings such as resolution being reset, so that will still need to be taken care of separately.