If your entire team gets supered by an FoH, then you absolutely deserve it.

Only if they are stupid enough to group up. It holds for warlocks and hunters. I have a couple of times gotten 4 people with one golden gun shot, I main a warlock so I'm not the best with it. But the same stands for nova bomb. I often miss people because I hope they won't see it coming or they manage to get it off the way luckily for them. All supers can miss.