No, Blenders look&feel used to be questionable in the past but then version 2.80 happened. They have an amazing UI (backend) now and keep improving.
What was my personal wow moment as a programmer, was seeing that changing the display scale slider in the app properties does actually update the whole UI tree, cascading, rearranging and collapsing things down in realtime.
GIMP and Blender were my go-to-examples for why the Bazaar/community-style open source development process doesn't really work for UX-intensive apps. Then Blender 2.80 appeared.
Perhaps its UX development process was more Cathedral-like, though?