Dear m012h,
Thanks for using Microsoft products and posting in the community.
I understand that you're trying to synchronize Outlook and Google Calendar and it's causing you problems, I understand how you feel.
The first thing I need to explain to you is that when you configure your Gmail mailbox in Outlook, it automatically grabs the IMAP protocol. The IMAP protocol doesn't synchronize calendars, so you can't synchronize Google Calendar in Outlook.
For more information, see the following link: Sync basics - what you can and cannot sync - Microsoft Support
However, you canimport your Google Calendar into Outlook to view it.
For more information, see the following link: See your Google Calendar in Outlook - Microsoft Support
Note: Changes made in Outlook are not sent to Google Calendar. To update your Google Calendar, open Google Calendar from your browser.
I hope this information is helpful and thank you for your patience and support.
Have a great day.
Best Regards,
Linda.L-MSFT | Microsoft Community Support Specialist