Idiocracy

  As the 21st century began, human evolution was at a turning
  point. Natural selection, the process by which the strongest, the
  smartest, the fastest, reproduced in greater numbers than the rest,
  a process which had once favored the noblest traits of man, now
  began to favor different traits. Most science fiction of the day
  predicted a future that was more civilized and more intelligent.
  But as time went on, things seemed to be heading in the opposite
  direction. A dumbing down. How did this happen? Evolution does not
  necessarily reward intelligence. With no natural predators to thin
  the herd, it began to simply reward those who reproduced the most,
  and left the intelligent to become an endangered species.

Idiocracy film (2006)  The best film to watch to see how crappy society

is.