iPad constantly crashes keyboard lags apps crash. Web pages constantly reloads

Hi netinman,

Welcome to Apple Support Communities.

If I understand correctly, there are performance issues with your iPad mini that are related to multiple apps quitting unexpectedly. Try taking a look at the article linked below and running through the general app troubleshooting tips that it provides.

If an app you installed unexpectedly quits, stops responding, or won’t open - Apple Support

Restart the app

Close the app and open it again.

Restart your device

Turn your device off and back on.

Check for iOS and app updates

1. Make sure that you're using latest version of iOS.
2. Open the App Store and tap Updates.
3. If updates are available, tap Update All.
4. If asked, enter your Apple ID password.

You might need a Wi-Fi connection to update some apps.

If the issues persist, try ruling out an issue with the installation of iOS on your device by restoring the iPad as shown here:

Restore your device from an iCloud or iTunes backup - Apple Support

Cheers.