Ugh no. The entire story is lacking depth. Is there even much of a story?
Yes, there is. It's hard to ignore when you're locked in rooms with characters that are talking directly to you.
The game felt like it was just trying to impress others with the physics engine. Physics weren't that common back then and it seems like Valve really wanted to show that off.
They were trying to impress with the physics.
Did you really expect a serious Duke Nukem game?
No, but Forever proved that Duke Nukem is outdated. The humor was very immature.
The "mediocre" gameplay as you called it is still better than Half-Life 2. The AI in Duke Nukem Forver is a lot tougher and smarter than the Combine AI in Half-Life 2. The AI in Half-Life 2 is scripted to miss their first few shots and they are also scripted to have long periods of hesitation between shots not to mention they are much weaker than the pig cops. Even in Hard mode you could kill a combine in 1 hit with a revolver.
Wait, so you're telling me that a 2011 game has better AI than a 2004 game?! You're comparing two games 7 years apart.
If you say so. Duke Nukem Forever is a much more faster pace, has a better AI, with better weapons, better vehicle missions, etc.
Since when does "Faster pace" mean "better"?