This game isn't SO bad. It's just ok and mediocre. It's a watered down, shortened version of the original Deus Ex. That being said, there are a couple of things that made this game worth playing through.
+ The freedom of choice is fairly broad and there are different ways to complete various objectives.
+ Fairly good story/Interesting to see the world post Deus Ex 1.
+ Good amount of missions per area to keep you busy.
+ NG Resonance Holo-Sim is waifu material.
- Mechanics from the first game became overly simplified (Guns/ammo, biomods, keycodes, locks, etc).
- Characters are not interesting.
- Stealth and combat are hit and miss.
- HUD is atrocious.
- Loading screens everywhere.
- Game can be a pain to get running correctly sometimes.
One thing I really want to comment on is the fact that I've had this game crash on me numerous times for the most random of reasons. I still don't know what was causing them or what fixed them, it just happens. It also seems to take up an obscene amount of computer processing power/memory for a game made over a decade ago.
It's not a terrible game per se, it's just not the follow up one would hope for after Deus Ex. I played through this because I was curious of the what the world was like after the events of the first game and that alone was what carried me through it. That and NG Resonance Holo-Sim.