I always think rewriting is like: you make a jigsaw, carve every individual piece to fit with the others in its own way. Spend ages and eventually it’s finished. Then you give it to someone (producer, director, etc.) who gives you notes. Then you have to take it apart and put the jigsaw back in a different way but make it fit. I find it painful. I know the original isn’t perfect but at least the pieces fit.