Korra was marred by production problems caused by Nickelodeon. It was supposed to be a 4 episode miniseries and then was a 12 episode single season show. I can go on and on about it. They never knew when they were ending. But the second half of season 2, they get confirmed that they have a season 3 and 4, and from there quality jumps greatly. "The Beginnings" is 2 episodes about the first Avatar and from then on the show never stops being amazing.