Penguins don’t do Windows!

I’ve been doing PC hardware for over 25 years. This is likely related to your laptop display - either the cable connecting the panel to the motherboard, the panel itself, or some motherboard component connected to the display output that has failed.

Try pivoting the display back and forth and see if the glitches change in response. If they do, it’s the cable.

Beyond that, you’d need to do some testing to find the hardware component that has gone bad.

“Hevy” is the name of the Clone Trooper from The Clone Wars that the computer is named after. That’s his helmet pictured in Neofetch, along with his famous quote, “You didn’t say ‘Please!’”

All of the computers I manage are named after Clone Troopers.