Can Feng Shui save a broken marriage or prevent a business from going bankrupt?

Can Feng Shui save a broken marriage or prevent a business from going bankrupt?

Yes and no. If the shapes and stars represent complete confusion and failure, then no matter what is done with the intention of correcting the situation, it will be a futile effort.
Some places are simply beyond our ability to correct the situation. The only solution in this case is to move to another suitable place.
If we can change the place so that it becomes harmonious, full of energy and love, then we can expect the desired results.