Hit detection is bad. Guns are all similar sounding and flat. Enemy AI is questionable at best. Enemies are all like the same guy in 4 different outfits. The AI buddy is a awful driver, goes like half a klick an hour, in circles around the area on one driving part. The aircraft are ugly, out of date, and the Yak-141 is being used as a low-alt level bomber, lol.
It's choppy and when it auto-saves the thing grinds to a halt. The music is all re-cycling 30 second clips, usually just when enemies are around, allowing you to never be ambushed, and always know when an area is clear
What isn't garbage is generic. All the missions are pretty much the same go to checkpoint, killing everyone in the area, where you either get a radio message, or 'interact' with the same 3 faces, who don't blink and who's mouths don't move when they talk. Then, kill your way to the next checkpoint. Had one sniper overwatch mission, which lasted 45 seconds before you had to move in. Vehicles aren't destructable. Nothing is destructable, bodies fall in one of 4 poses, no bullet holes in walls, glass, or other terrain.