In my opinion the number one reason people aren't finishing the Hard mode is due to the lack of heavy ammo people bring in with them. Some don't even bring in any and rely on rng for heavy drops. Crota won't go down, and the blame gets put on the sword bearer for messing up. When in fact Crota wasn't put down at all and ends up slicing an articulated cut into the brave hunter. That and all the bugs. Two middle fingers up to you bungie.