There are many moments in video games that were the worst for me and my experience in gaming.
1. Mirrors Edge- Mirrors Edge is a great game, but in the moments were combat is essential the fighting makes the game so much harder. The only way to get it is by dying many, many, many times just to pass one part.
2. Call of Duty- In the earlier games playing on veteran was a very daunting task as the enemies were numerous and they kill you in a minimum number of bullets. The checkpoints also love to screw you over as sometimes it can save while you are in the middle of gunfire.
3. Destiny- being one of my favorite games it really gets me down sometimes. Imagine, you completed that very hard mission and you can't wait to see what you get...only to get absolutely disappointed in what you get. The luck system in that game has screwed me and my friends over too many times to count and it is by far my least favorite thing about the game.