Why does other Q&A platforms hate StackOverflow? [closed]

  c++, java, javascript, php

I really don’t understand why people from other Q&A sites, like Quora, hate StackOverflow. I know sometimes the people here are a little mean, especially for newbies, and there is a solid reason for that. Why don’t they understand this and acknowledge the importance of this site?

Source: Windows Questions C++