there are plenty of documentation in the form of tutorials on for nearly every aspect of every programming language I can think of. I think it's important to keep in mind that we all learn differently and sometimes one explanation can make no sense while another makes a lot of sense.
That said, I think I get your frustration in that sometimes the process of _finding_ the explanation that clicks for whatever your question is (how to emit assembler?) can be really painful because all the explanations are shallow.
However, I don't think it's fair to take that frustration out on the writers (I got the impression you were, but maybe you weren't and just felt like venting). I for one encourage engineers to write if no for no other reason than to better cement their own understanding.
I do wonder, though, if maybe there's some improvements we can make to how we filter / search for long-form technical articles outside of google so that the content is more relevant