1) Misery loves company. someone who is unhappy only gets happy
  when someone can be unhappy like them, then they're happy. 2)
  They need to make themselves taller by standing on other
  people's heads. 3) They're like a perfect shiny apple on the
  outside, but rotton to the core. 4) Some people are only happy
  when someone is sick or dying or has some major life trauma.
  They feed on real-life soap operas. "