-Halo has a better story
-In Halo, there's more than 6 -blam!-ing gametypes
-Halo doesn't make you pay for DLC that fixes it's story
-Halo has silly gametypes like Action Sack, Races, and Grifball, while Destiny is all "Kill enemies to win"
-All of Destiny's Strike missions are "Defend Dinklebot. Kill boss."
-Halo doesn't make you grind your ass off by playing the same damn missions, strikes, and gametypes just to get half-decent gear
-Halo doesn't constantly release patches to fix itself
Destiny was a broken game when it was released because it was rushed. My expectations were let down and I don't think I can forgive Bungie for it