The SHOCKING Reason VAR is Killing Your CSGO Game
If your getting high var in net graph that means your server all over the place performance wise. If its in single player then means your CPU is seeing heavy use. Check for virus or programs running stealing CPU performance. Could also be low settings have moved all your GPU workload on your CPU. Set GPU settings to medium at the very least. CSGO has become a memory leak feast and overly needy of RAM. You could also get another 8GB's.