Definitely not. AOT is a work of fiction that combines elements of fantasy, action, and drama. It's set in a made-up world with its own unique plot and characters.
The AOT manga has finished. It wrapped up all the major plotlines and provided a conclusion to the story that fans have been following for a long time.
The AOT manga has indeed come to an end. The story concluded with the last chapter, bringing closure to the series. However, fans' reactions to the ending have been quite diverse.
Not necessarily. While AOT is highly popular and has many merits, whether it's peak fiction varies from person to person. Different people have different standards and preferences for what constitutes peak fiction.
AOT stands for 'Attack on Titan'. 'OC' usually means 'Original Character'. So 'aot oc fanfic' is likely a fan - made fictional story in the Attack on Titan universe that features original characters created by the fanfic writer.