The high-res images are upscaled and pixelated. So they still look bad when used as a wallpaper on big monitors. Looking at images like `2023/DigitalSWAG/Wallpaper-Desktop/shapes/6016x3384.png`, zooming in:  Zooming in more:  Zooming in even more, and highlighting ACTUAL pixels: 
The high-res images are upscaled and pixelated. So they still look bad when used as a wallpaper on big monitors.
Looking at images like
2023/DigitalSWAG/Wallpaper-Desktop/shapes/6016x3384.png, zooming in:Zooming in more:
Zooming in even more, and highlighting ACTUAL pixels: