It's puzzling, considering they made some strides towards improving their design language and systems in past years, which produced IBM Plex etc. under Mike Abbink.

They have a decent component system with Carbon[0] and a whole design principles website[1] which they could have easily pointed their LLM of choice to.

Even the ibm.com landing page isn't close to the design system spec, rounded corners and whatnot...

[0] https://preview.carbondesignsystem.com/ [1] https://www.ibm.com/design/language/