I’d say that older games on Steam often work worse. Developers can sometimes unintentionally break compatibility with newer systems through a patch. You just need to know where to download it. I struggled with high ping until I downloaded the game from
csget.me . They have a classic version there with clean configuration, that you can set up for yourself. Also their MasterServer finds hundreds of active servers. When I played on another version, there were only about 20 servers, so I was surprised to see such a wide variety of them here. Sadly, most of my friends are newbies who don't want to play with me. Which maps do you like best, by the way?