As an author I have discovered that there are many people out there that are just waiting to criticize others. Some are just dying to be your friend, but the reasons for that friendship are not always honest.
Reviews are good and some, well, are just bad. But that doesn’t mean that your writing is completely terrible. It just means that the message or story that you were trying to tell doesn’t fit well with that person. Think of it this way. Theres movies out there that you just don’t want to watch. It is not due to the fact that they are bad movies. It is because they do not appeal to your personal taste.
So don’t read that one star review and let it crush your hopes and dreams. Your story might not have been suited for them. What is important is that you continue to follow the dreams and goals that are your own.