I know nothing about songwriting, but I listened to a lot of Decemberists back in the day. Compared to their usual output, this is painfully bland. Their songs generally have a clever or spooky underlying theme, a strong sense of perspective, and often bits of cheeky humor. I understand what led the AI to write this as a Decemberists song, but it's like a second-grader's understanding of one. If this weren't sung by Colin Meloy himself, I would never peg it as such.