Have you even bought what you thought was an awesome homeschool curriculum? Have you even changed your mind once you started using it? Wow... I sure have. I have invested time and money into things that were just absolutely wrong for our homeschool. I have had to stop mid year and just admit that it wasn't working. I have found that if I just remember that CHANGE IS GOOD... I can look at what we were doing and find a plausible solution that meets our needs much better.
I don't worry that I wasted money - you know you can always sell your old curriculum on ebay! Yet, before you actually commit to a new curriculum make sure that you review what it was aobut the old one that you hated, and what you would like to see the new curriculum accomplish. With this in mind, you can search all related curriculum options for the subject matter and find a curriculum that better suits what you were looking for. So changing in the middle of the year actually brings you to a place where you are more in tune with what you are looking for out of a curriculum. We can always learn from our mistakes!