Do you mean a ghostwriter--or an (comprehensive) editor? Though I'm not an authority, I suspect that most ghostwritten works are supposedly non-fiction (some politicians have an odd take on reality); they're mostly written for someone who has insightful or humorous personal accounts, yet neither the skill nor desire to write about them in a way that sells. Fiction is written by those that have a story they want to tell.
In any case, I would stop writing the work frustrating you for a while--but don't stop working. Write some unrelated, shorter pieces. Participate in the 75, 100, 300 word competitions here, which are fantastic for improving your writing and making every word count. List brief story outlines as you have ideas, then write them when inspired. Keep these interim works to 5,000 words or less--much less. 1-3 thousand word stories hone skills without a lot of investment or chance of diversion.
Another option is to edit old works. Take a short piece and carve through it 3x, see how it turns out. When the mood strikes you, not the urgent need to get it done, yet the need to tell that special story you worked on, then go back to it. If you do all the things I suggest above, you'll hate it on your first re-read because, you have become a much more experienced writer. It's then you find what is frustrating you now.
K2
