Sorry to hear about this experience. I would request you try resetting Illustrator's preferences manually and check if that helps resolve the issue:
- Close all Adobe applications. - Go to Location C:\Users\%USERPROFILE%\AppData\Roaming\Adobe - Rename Adobe Illustrator and Adobe Illustrator 26 Settings folders to Adobe Illustrator.old and Adobe Illustrator - 26 Settings.old
Disclaimer: Please note that renaming preferences folders will remove all the custom settings, and Illustrator will launch with default settings. You can also take a backup of the folders in case you want to. The location is mentioned above.
Also, try removing and reinstalling the GPU drivers and share your observations.