1. Missing the target
2. Forgetting the objective.
3. Bad internet connection.
4. Clutch MLG Fails.
5. Doing the same plan every single time.
6. Not replenishing your loadout.
7. Mixing control setups.
8. Rage quitting.
9. Finding a glitch at a bad time.
10. Reloading during a fight.
11[Bonus]. Not saving before a boss fight.