That summary seems to wrap it up pretty well.
On top of this, their "support" answers any issue reports with standard templates about updating graphics drivers or adjusting settings in the nvidia control panel to improve performance or telling me afterwords, that linux is not supported and i should use something like Crossover (just another standard template) while i told them, that the game is running with dx9, just with very low FPS.
So one bad update alone would not be a trigger for me, but combined with a support that does not deserve this name, i wont spend any more money on this game as of that update.