If you lag when pressing ESC in csgo or alt/tab try this fix
You need to add : Add "0.0.0.0 blog.counter-strike.net" to your hosts file (C:\Windows\System32\Drivers\etc\hosts by default)
The file is protected so run it with admin rights.
This will block csgoblog and the game will not send 9999 requests to update it and you will not lag.
Also your csgo background will be blank more clean like this imgur.com/a/0mDQcEW and the game will feel way way more smooth.
Bravo. The one from csgoblog but not only that it blocks the site you cant acces it from your browser as well but the game since 2017 is bugged and keep sending requests to update it even when you playing so this just totally block the news page.