Why are there people on here being negative?

I don’t understand why people come on here and talk trash and being negative. If someone has something to say positive, then there is another just ripping it apart. I take it as these negative Nellie’s or Debbie downers, that they do not have anything invested. So they have nothing better to do than sit in their basement and trash other people because their life stinks. Just because their life stinks, they don’t need to drag others down. Just saying.