I have had this problem very recently. I have had constant ping over 100 in cs go. I did a ping test on 2 computers yesterday in command prompt and found packet loss. Today i have no packet loss in command prompt but still have high ping. Everything else works fine, cs go is the only thing that is lagging. I have also found some choke when using net_graph. I also went on my friends account and got 30 ping which I usually get.