
Originally Posted by
DarthEnderX
I mean, he's not. That's a real common thing in fiction that, when someone does something evil, the ones that didn't prevent it blame themselves. And, frankly, it's a bullshit trope.
You aren't responsible for the actions of others. At least, not when you have no authority over them. Everyone is responsible for their own actions.
It's one of those ideas that would make Batman the most evil man ever for not killing the Joker. But even then, Batman KNOWS Joker is gonna escape and kill more people. Rimuru didn't know any of this would happen.