Macbook air keeps freezing after OS upgrade to Ventura

Hello tanujsinha,

Welcome to Apple Support Communities!

We want to make sure the macOS is working perfectly and not having an issue after waking from sleep.

Even though the title of this Apple Support page doesn't exactly match the issue you've explained, it still has the best steps to see if an app is causing the issue:

"If an app freezes or quits unexpectedly on Mac

When an app on your Mac stops working, try these suggestions.

• If an app doesn’t quit as expected, or it’s unresponsive, you can force quit the app (you may lose unsaved changes). Choose Apple menu  > Force Quit, select the app in the dialog that appears, then click Force Quit.
• If the app quit, reopen it by clicking Reopen in the dialog that appears.
• Restart your Mac by choosing Apple menu > Restart.
• Make sure the app is compatible with your version of macOS.
• Open another file in the app. There may be a problem with the original file.
• Check for updates to your software.
• Disconnect any peripheral devices you just connected (for example, a printer). They may not be compatible with your version of macOS.
• Uninstall any app plug-ins or enhancements from other manufacturers.
• If you recently updated the app or macOS, a plug-in or enhancement you installed may no longer be compatible.
• Diagnose problems with your Mac to learn whether hardware you installed, such as additional memory, is incompatible, improperly installed, or defective."

This Apple Support page has the full details: If an app freezes or quits unexpectedly on Mac - Apple Support

We hope this helps to further isolate and resolve the source of the issue causing the system to stop responding.

Cheers!