[2020] Why do people ban Echo?

I think banning Echo is somewhere in between not wanting to play against him because he's frustrating, and a comfort ban. I think Echo could be one of those ops that are easier to deal with if you have coordination. Like, IQ is his biggest counter since she can just see them through walls, Thatcher can EMP them (if he's not banned), they emit this humming sound that's pretty easy to hear if you listen closely.