Tie between Why Try and JALBOYH. Why Try because it jumps over Break Free to snatch the title of most bland, formulaic, and unimaginative song on the album, and JALBOYH because it's so unmemorable.
Worst song on the album is Little Bit Of My Heart. I'm sorry but it's only there coz Harry effing Styles had writing duties on it. It's like he wrote his first song or something. Its boring.