Why cant i run it with these specs?

everytime i move the game freezes and its unplayable.
8 gigs of ram
intel i5-6600k @3.50 ,3501mhz
geforce gtx 750ti

When playing in a map, RAM usage by the game process can easily exceed 6GB. You can get the game to run by up'n vRAM but that's not a performance-friendly solution.