There are a lot of G.I. Joes in the Joe organization. While every commando unit needs people to run the administration of the unit, not all of them need to pretend to be useful on the battlefield. We covered the least intimidating G.I. Joes so it makes sense to look at their arch-nemesis: Cobra.
Cobra is just as big as G.I. Joe, with just as many people. It's bound to have some dead weight Cobras, or those least likely to help take over the world.
1. Sludge Viper
I can't list all of the short-lived eco-warriors. I wish I could, because on both sides, they're absolutely ridiculous.
The most absurd on the Cobra side is Sludge Viper, whose sludge gun (yeah, sludge gun) has unlimited ammo because it degrades whatever is around it into more sludge and shoots WEAPONS GRADE SLUDGE at high velocity. You know, laser weapons weren't real (yet) when GI Joe was on TV, but we bought it because we all know they will be.
But no one has ever thought of weaponizing sludge. EVER.
Because you're awful, CC. Just awful.
The only good plan he ever had was to kill Serpentor, the only commander more worthless than he was. And guess what? He botched that too.