After my 3rd day on Manhattan I, too, have given up.
I kept waiting for the game to get fun, instead it's a chore. After all the flack ARMA took for being released buggy, how HOW could they have released ARMA 2 in such an unplayably buggy state. When I play ARMA2 I don't feel like I'm playing soldier in a relaistic simulation, I feel like I'm in a puzzle game where I must navigate a minefield of bugs in order to complete a mission. Operation Flashpoint played better 10 years ago than this warmed-over piece of crap plays now.
This game goes in my top-10 worst game purchases ever.