design should be visual, you should not have to write code for it.

Even if you write code for it, you should be able to write code in a way that express your high level thinking, something similar to constrain layout in mobile dev. CSS has 4 levels of overlapping features so far and every new layout model comes out are slightly better but still a little bit off. The newer features like variables have bolted-on syntax that looks like garbage, nobody understand CSS grammar anyway (does it even have one?)

Given how convoluted CSS is despite how little it has to do, I consider it a poorly designed programming language, if you can call it that.