Both of the official Ubuntu wikis (and why do we have two of them when they both run on MoinMoin?) are objectively hideous to look at, especially in the context of modern web design standards and more pressingly, almost certainly in violation of many accessibility standards regarding typeface selection and contrast.
Just pick a page at random on the Community Help wiki (or take a look at this one that I just got done editing moments ago, and remain disgusted with the general appearance of, despite my best efforts) and find the nearest code snippet and you’ll see what I mean. I had to summon forth all of my code monkey wizardry just to get the URLs for the current daily ISO images to appear in bold and center the table to reflect that they are, indeed, some of the most important pieces of information on the page. The CSS for the Community Help wiki may have been a good effort when it was written, but compared to any relatively modern CMS it borders on unusable.
I’m also at a loss to explain why there’s been no talk of migrating the wikis off of MoinMoin and into MediaWiki, which would be the single greatest improvement to the Ubuntu documentation possible. After this many years of being pantsed by the Arch Wiki, I don’t think it’s unfair for most people to conclude that Ubuntu just stopped caring about documentation altogether. Among people who are inclined to contribute to documentation, two de facto standards have emerged in the way of syntax: Markdown and MediaWiki. I think it’s vital for us to recognize this and get with the program; the longer we delay the harder we make it on ourselves to get back into form and habilitate our image in this regard.