What was the worst vault in Fallout?

In the realm of Fallout, where danger lurks at every turn and players must navigate through a post-apocalyptic wasteland, one question that often arises is: What was the worst vault in the series? Was it Vault 101, with its rigid social structure and stifling environment? Or was it Vault 111, where protagonists awake from cryosleep to a world vastly different from the one they knew? Or perhaps it was one of the more notorious vaults, like Vault 87, where horrifying experiments were conducted on its inhabitants? The debate is fierce, as each vault presents its own unique challenges and horrors. But, which one stands out as the absolute worst in the Fallout universe? Let's delve deeper and explore the possibilities.