[Multi] What the Hardest Game You've Played?

The mission "Burn them out" (or something like that) in Call of Duty:World at War when it's on Vetran Diffuculty. You play an American soldier and you have to storm the Japanese dug-in trench. It's so retarded. First there's an unlimited number of Japanese, so you have to keep advancing or they just keep respawning. Second, even a pea-shooter would kill you. Third, they keep spamming grenades to prevent your advancing, which just means that it goes in for forever... I still haven't gotten past it because the enemy AI is so cheap.