Machina is practically made to bodyshot.
It gives away your position too easily with that big ass laser if you miss on the first shot :P
Also there is the no shooting without scoping...which is annoying...
It's practically a campers dream, sit in a corner a build up the charge, bodyshot someone, hide in a corner and wait again.
I'm not saying that's how you use it, but it's how a lot of machina users play, and it gives a bad name to machina users that want to actually get head shots and just use the gun because it's cool.