The content of fnaf freddy is not about action hero gameplay. In Five Nights at Freddy's, you are a night guard trying to survive with very limited control. You cannot fight the animatronics directly, so you must rely on observation and quick thinking. That makes the game more stressful and more memorable.
FNAF Freddy is easy to understand, but it becomes challenging very quickly. In Five Nights at Freddy's, new players can learn the basics in a few minutes, yet surviving all the nights takes practice.