Occasionally, incorrect game settings or configurations can result in the absence of the reconnect button in CS2 following a disconnection. Resetting the game settings to default can effectively eliminate potential conflicts or misconfigurations, potentially resolving the issue with the missing button.

Check the stability and reliability of your Internet connection. An unstable connection can cause Steam to download improperly and connections to game servers time out. If you suspect that you are having a problem related to your Internet Connection, please contact your Internet Service Provider (ISP).

CS2 may not be working due to permissions or corrupted files. Try running Steam as an administrator to verify the game's integrity, and check your graphics card drivers for any potential issues.