In my own experience, w3schools is the quickest way of getting the information I want, which I guess is why it is at the top of google. I know it isn't cool to like w3schools, but then I'm not a cool programmer.
Seems like a nice passive income project - man pages for HTML / CSS aimed at beginners but with advanced information too.
I'm surprised it hasn't already been done. Perhaps it has and I just don't know the URL.
[1]: http://web.archive.org/web/20000815210025/http://www.w3schoo...
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/ta...
I find MDN and w3schools about equal, although I do find w3schools is a bit better laid out and quicker to get the info I'm looking for. MDN certainly isn't perfect...I just had a quick look for some html5 stuff (MediaElementAudioSourceNode) and the page is missing on MDN. I find that w3.org is the only place that has full specs for all the html5 stuff, but it's pretty difficult to navigate.
I agree with what you write about w3.org, it's almost painful to navigate when you just need a quick reference.
As for "perfectly usable", mountaindragon (result 2) and codesinhtml.com (result 3) are atrocious. And makemyownwebpage.com (result 10 or so) looks like a homepage from the 90s.
I think the issue is that DDG is getting crappy results from yandex, then filtering out the good sites to make the results even worse. Weird :)
As for search results: I tried DDG again last week, and was shocked by the poor quality of results compared to google, bing or yandex. Search for "html table tag" and you'll see no w3schools or MDN results. Instead a lot of other, crappier sites. Google, yandex and bing all show w3schools and MDN near the top, so DDG must be filtering these results (which is ironic, given that they say they don't put you in a "filter bubble").