Videogame Dunkey pointed out that the boss fights in Destiny were "tough" simply because they had a lot of health. This also made the game feel monotonous and laborious for players. He also pointed out how the AI (Artificial Intelligence) in Halo was far more superior than the AI in Destiny. In Destiny, you can pick off an entire squad from long range, while none of them move or react. You could also back around a corner away from an advancing group, and then take them out as they come around the turn one by one, without having to move your sight very much. Patiently sitting back and waiting until the enemy makes a move, whereupon you take your shots in practice, felt more like a shooting gallery with pop-up targets. The real challenge in the game was being overwhelmed by sheer numbers of enemies, or accidentally running into an area that's "too high" for you. The end-of-mission bosses I've encountered have a similar lack of depth. If you find a nice piece of cover and park up, the boss often goes into a behavioral loop where you can predict what it's going to do. As long as you sit in a safe area where you can't be hit, and then pop out and rattle off a few shots when the boss has completed its volley, you can rinse/repeat until it's dead. It's a good way to complete the mission, but it's a somewhat hollow victory. A win through repetitive attrition as opposed to a thrilling firefight.