A Masculine Ending

Considering the time, effort, and expense of shooting a film in two countries one would think someone involved would have read the script. The entire situation is impossible. Without giving anything away it is difficult to comment. But a girl commits suicide, and is found while the main character is on holiday in Paris. The murdered man is killed on the main character's first night in Paris. Later we learn that this is in response to the girl's suicide. Yet if we have watched the movie, we realize that the body of the suicide victim had not been discovered yet. There was no motive for the crime! This is just one of many logical blunders in this poor excuse for a murder mystery. How do people who have obviously been savvy enough to make the money it takes to finance a project like this not have the common sense to notice the product they are paying for is impossibly bad? I will always be flabbergasted.