Did you know you can still play CS:GO on community servers?
Guide to Still Play CS:GO
In your Steam library, right click Counter Strike 2, click Properties, click the Beta tab, and select “csgo_demo_viewer – 126.96.36.199” from the drop-down shown here.
Once it finishes downloading, you will be prompted to select between CS2 and CS:GO when launching the game.
There you have it! See, it was never gone! Keep in mind this is only for community servers. Happy gaming!