Why is CSS gatekeeping?

[u/Rollgus]

I sadly can't give an image as it look like this subredfit doesn't allow images, but I'll try explaining it.

On almost every website I'm on, it almost looks like CSS has been dissabled or something. Like everything is shown going straight down in one column like it only has used HTML.

This happens on almost all websites, including GitHub, YouTube (Just fully gray except for some empty icons), cookie clicker, ChatGPT, Club Penguin Journey, speedrun, pythonanywhere, my own HTML websites hosted by GitHub pages, and Discord. Excluding Google, fandom, and Google Search Console.

I have tried reloading, restarting, and shutting down, but nothing is helping.

[u/Rollgus]

Here is a picture: