The Hunter isn't the worst class, but it is the most demanding and has the highest turnout for kills when used properly. I've used all classes and sub-classes, and while some are definitely better than others in certain situations, none can be called the worst class. I will admit that the Hunter's perks look fairly worthless, but when used in certain combinations Hunters can become gods. It only takes a little bit more work than the other classes to find that perfect setup.