Patriot (Amazon, 2015-2018)

Patriot remains the quintessential example of a masterpiece unseen, with scores on Rotten Tomatoes and Metacritic 15% higher than the average spy thriller, yet Amazon cancelled it after two seasons—a decision that left its cult following devastated. The show, centering on a folk-singing CIA officer, earned comparisons to the intricate tone of #9 Giri/Haji, but suffered from a marketing budget 80% smaller than Amazon's flagship series. Despite an average episode cost of $3 million and a 92% critic approval, fewer than 500,000 viewers streamed its debut month, making it 30% less watched than the typical niche comedy. This cancellation ranks as one of the worst for its sheer disconnect between quality and audience reach.