Sorry to hear that. Were you trying to run the windows version or Linux?
Also are you using Nvidia or AMD? Could be an issue with the settings.
Viewing post in Mari's Mountain Rollout comments
From what I can see, it seems like there is an issue with an AMD driver update some time this month. The user here had to downgrade their driver and disable updates. https://forum.godotengine.org/t/graphics-freak-out-on-amd-cards/118661
Hope that helps