After reading many of these posts it sounds like ArmA II was designed very bad.
I have some of the problems that have been talked about such as strange performance and AA issues. For example my game has constant short peroids of around 2-3 seconds where it will slow down to unplayable frame rates and then go back to normal frame rates regardless of what I am doing. The anti-aliasing in ArmA II is also terrible in that if I have it turned off I notice white pixels around many objects as if it was designed to be played with 8x AA and only 8x AA turned on.
How have these problems gone un-noticed after so many patches? Are there any fixes for these?