Because they're OP. No I'm not joking, they're actually pretty op lol. The only reason people don't call OP is because they're incredibly difficult to use correctly and a bad fusion user is dead meat. I've gotten plenty of hate though with my Vacancy and Pocket Infinity. Master the charge time and you've won. I got a hate message by a shotgunner once because he did nothing but shotgun. After a few deaths from him corner camping and shotgun rushing I started pre charging around every corner and turning him into ash. The only reason fusions aren't nerfed into the ground now are because it takes an incredible amount of skill and prediction to use a fusion to its full effectiveness. Most players don't, and even fewer are able to do it consistently. So basically what I'm saying is #NerfFusionRifles Edit: No I'm not saying nerf fusion rifles, it was a joke. I was just saying that fusions are incredibly good right now if people actually learn how to use them properly. If it weren't for the fact that they were hard to use they would be considered OP, which is why you get so much hate if you're actually good with a fusion.