The fatal flaws of the left/elite/progressive/whatever-term-you-prefer are the following:
1) utter lack of sense of humor,
2) inability to allow others to be wrong, and
3) disdain for human life.
The first makes them insufferable and will loosen the strangle hold of media influence as the leftie produced entertainment no longer entertains.
The second tears them apart internally as they eat their own every time the tide turns and the new "correct" evolves.
The third provokes a selfish, sterile lifestyle which produces natural limits on their influence, needing to indoctrinate the children of others for lack of their own.