Sorry to hear about this trouble. That's not a typical experience with the application. Unexpected behavior in application can be caused due to corrupt/ damaged preferences. Please try resetting Illustrator preferences and let us know how it goes:
Close all Adobe applications.
Go to Location C:\Users\user\AppData\Roaming\Adobe
Rename Adobe Illustrator and Adobe Illustrator 24 Settings folders to AdobeIllustrator.oldand Adobe Illustrator 24Settings.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.