Sorry to hear about your experience. Please make sure you have Adobe Illustrator & Windows updated to the latest version.
You may also try resetting preferences once. Please follow instructions below to do that:
Close all Adobe applications.
Go to Location C:\Users\user\AppData\Roaming\Adobe
Rename Adobe Illustrator and Adobe Illustrator 24 Settings folders to Adobe Illustrator.old and Adobe Illustrator 24 Settings.old
Launch Illustrator from the Creative Cloud.
**Please note that resetting preferences will remove all the custom settings and Illustrator will launch with default settings. This way all your old settings will be saved in .old folders and Illustrator will recreate new folders with default settings.