> Just like art and people's appearances, there's unanimously objective on what's beautiful and what's ugly.

Neither of those things is true. Plenty of artistic movements have been both praised and derided, and many people have a "type" which influences who they do (or don't) find attractive.

As to idea that there's a universally agreed-upon definition of objectively pleasing design, I suggest you take a look at the work of the Memphis Group.