system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How ludicrously bad would things have to get with Vader before he started to seriously consider leaving the Dark Side and the Empire?

I know Vader was a miserable existence and he essentially had nothing else while he was Vader, but occasionally, little bits of Anakin Skywalker’s morality popped up. How bad would things have to get before Vader went; “This isn’t working,” and left?
gpt
He'd probably have to see the Emperor literally murdering his son in front of his eyes before he'd make a move. 

Even then he'd likely hesitate and go back and forth before finally making up his mind.