Most learners spend a year or two working through a textbook, feel reasonably confident, then open an actual Japanese news article, blog post, or novel and understand almost none of it. This isn't a sign of failure. It's a predictable result of how textbook Japanese is built.
Textbook dialogues are written to demonstrate a specific grammar point using a small, controlled vocabulary. Real writing has no such constraint. It uses whatever word, structure, or reference actually fits the sentence, including plenty of things no textbook chapter ever covers in isolation. The gap between the two isn't a difficulty gap you'll close by finishing more chapters. It's a gap in exposure to the real thing.