I am thinking of getting a brain transplant
A transplant requires you to possess what is given (a brain, in this case). It's apparent that with your fixation and lack of judgement about these projects, you're having a brain is called into question.
Perhaps a "cerebral donation" is what's in order?
Like you, I'd rather take the worst possible project and begin anew. No matter how it ends up, it will be far, far better than it was. And knowing you, it will be sumptuous when you obsession takes a holiday finally.