What is beauty and design?

I mean what is real beauty and good design? Why one designer is good and another is bad? Why one dressing is beautiful and another is not?

Because all of that is very close to the term "natural". All of us as adjudicators of beauty have a vision of nature. We know how forest, grass and a river look like. Nature things are always beautiful for us. We will never call a bear or mockingbird ugly as a result of its shape or color or set of colors. Nature is the most professional and "natural" artist. That's why nature creatures are always beautiful.

So, any picture or dressing or spacecraft created by human should be beautiful only if they look like nature set of shapes and colors...