It makes sense Shooters are very popular, I just personally think they seem a BIT too good 'overall', vs lots of other weapons and weapon types. It is extremely hard to battle the speed and consistent kill power of most shooters, + their great kits, when you are most other weapons. Dualies, too, since they are basically just trickier shooters mostly.
I always feel like I am playing hard mode using many other weapons, haha.
Of course, some specific weapons are still really good and probably OP (Sloshins Machine, and the occational absolutely game-ruining Charger). But mostly when I lose, it is cuz the entire other team is stuff like 3 shooters and 1 charger.
I also rarely see Rollers at all. And when I do, it is most likely Carbon users that are clearly high as hell