The Terminus font doesn't seem to render properly there. Possibly it's just my browser but I use that font all the time in the terminal. Here it looks glitchy/aliased or something.
It's one of the reasons why I still haven't fully switched to VSCode. There doesn't seem to be a way to disable antialiasing in VSCode to make this font look good, as far as I can tell.
You can uncheck the AA option on programmingfonts.org though. I need to make something to make fonts render at their “proper” size when needed...