Just some quick things to do in game.
You have to go in the server and following some steps :
- Check your current ping and if possible your current fps
- Open the console and type the following commands :
- /rate 32000
- /pb_sleep 500
- /cl_maxpackets 100
- /r_primitives 2
- /com_maxfps 125
- Check your new ping and new fps and give a try.
Just adding some tips to your post, thx to have shared your experience
Edit : well after checking your rate in the server you don't need to search anymore. You are playing with rate 4000 so it's normal if you got a very bad lag and high ping.
To solve it do /rate 32000