Today, Kafka is considered one of the most important writers of the 20th Century, and the slippery adjective "Kafkaesque" is itself a testament to his enormous influence. But in his own time, he was just that intense weirdo wandering around Prague. Kafka wasn't exactly cheated out of fame, he simply wasn't that motivated by it. He burned the vast majority of his own work, and we'd have nothing at all left of him if his friend Max Brod had respected his dying instructions to destroy his remaining brain gems. Instead, Brod published them, and the world was immediately entranced by this master of existential thought.
Pro tip: read Kafka at the DMV sometime. You'll understand the universe.