Hello Ishaq,
My solution, suggested by Microsoft, was to go back to Outlook Classic. I did this and have had no problems since.
The "new" Outlook has many bugs in it and is, basically, still in Beta. You're correct, terrible for a company like Microsoft to launch a product that is unstable.
I have Microsoft 365 (formerly Office) and the remote support assistant set me up.
The live support link is (for the UK) Contact Us - Microsoft Support (https:// support.microsoft.com / en-gb / contactus), you may need to use something different for your part of the world.
I also disconnected OneDrive, it's more trouble than it's worth, I backup on an external drive and share using Google Drive.
Hope this helps.