I played in the alpha and could barely play because of insane fps drops and stuttering. I have a AMD Radeon 7800 series, 8gb of ram, ( not the best rig) but i can play most games without issue (Arma 3, Tomb Raider, etc).
This one game- Insurgency Sandstorm- totally goes full turd the moment i start it up. Even the main menu stutters and textures pop in and out.
I'm starting to feel a little jaded here, and beyond frustrated.