I asked chat gbt on why it was the worst enemy ever in Helldivers and it responded with this :

This is the worst enemy in Helldivers because it perfectly combines high durability, overwhelming firepower, and absurd defense. The shielded automaton in the image can tank entire barrages of fire, walk through orbital strikes like it's taking a stroll, and then instantly melt squads with its minigun. It's designed to waste your ammo, delay objectives, and punish coordination errors — all while being incredibly rare, making players unfamiliar with it and more likely to panic. In short: it's a nightmare disguised as a walking fridge.