My scene view looks blocky and red.

Does someone know why my scene view looks like this? I just clone this barely empty project.

I’m using Pop Os.

No idea what Pop Os but first place I would check is your video drivers.

Here is another potentially-related commonly-caused video glitch, might apply in your case too:

tofu fonts and / or blank buttons:

I read recently this can be fixed by specifying OpenGLCore in the preferences, as follows: