The current page isn't to my taste, but it at least makes sense to optimize nim-lang.org for selling people on the language. And the result is that I tend to type 'lib' into the search bar to get https://nim-lang.org/docs/lib.html, which then has the links I want prominently at the top left.
I agree to a point. For a very long time I always got irritated when I clicked on the "Documentation"tab and didn't immediately know if the actual documentation was on that page and if, how far I had to scroll to get to it.