It is fun to just write. For me it means un-writing. When I'm having doubts about a chapter or even a word, I know I'll be revisiting it. I try for avoidance and delusion knowing full well, I'll be making that change.
So why do I leave it unchanged the minute the feeling haunts me? Because I don't have a solution. This frustrates me, but the only way I'm going to resolve that un-loving feeling is to just write. Eventually it comes to me.
That's what has happened to me just today. The solution is so amazing, the inclusion of it will make the ending so much better.
And why haven't you been able to jut finish this masterpiece, Liz? Because, unlike the beginning of a story where you have the whole thing ahead of you, the ending is where everything is behind. The ending means, there is not much left to say, but it's the most important nothing in the book, so it's harder to hurry up and be done.
So if anyone else is having trouble finishing a book, and I know some of you are because you've told me, don't despair. I believe it's an evolution.