The plot thickens until it turns to sludge.
I started saying this back in my corporate days whenever I would hear something that had gotten way too complicated than it needed to be. This saying works well in any situation in which you find yourself frustrated by a problem so dense that it defies resolution. The perfect time to say it is when you are informed that the elegant solution you thought would solve a problem won’t work, because a new, “this just in” piece of information has just come to light that contradicts your original assumptions. When making this statement, grimace slightly, hunch your shoulders (as if a heavy weight lies upon you), and affect an air of resignation and measured disgust. This will get the point across.