I'm not a professional designer or 3D modeler but I've used Blender quite a bit. I know what you mean but the latest UI post redesign isn't bad.

Blender does a LOT of stuff. Its not an easy product to create an UI for. But I think the problem is much bigger when coming from a different 3D package than when learning from scratch.

My teenage kids use Blender as the first 3D package they've ever learned. I was impressed with how quickly they ramped up through videos and learning from each other.