nuke threshold
noun
When working on a project or task, the point at which it’s easier to blow away all progress and start over than to continue and fix the correct problems.
Carmine looked at the screen in frustration. His current draft of the chapter of the novel he was working on had so many flaws. With a sigh, he selected all of the text and hit DELETE. He had passed the nuke threshold; it was time to start fresh.