That is not normal. Since the vertical lines do not extend all the way down the screen, I would not suspect a screen issue. Does the same thing happen when booted into Safe Mode?
Start up your Mac in safe mode - Apple Support
After restarting again normally, I would suggest posting the free EtreCheck report here using the Additional Text option when posing. After the report is created, click the Share Report button on top and then Copy to Clipboard. The report can then be pasted into the Additional Text field. This will show files that are being launched on startup that may be causing that problem and it does not show any personal information.
Using EtreCheck - Apple Community