Celtarican

Compare the manga to the anime:

Note that in the manga, they specifically state that it doesn’t really matter where Sandman learned how to run like this and that it’s not some mystic native art or something inherent to his biology. In the anime, it’s strangely the opposite, which is really unfortunate because it ends up invoking racist ideas like phrenology and other discredited pseudoscience that claims that some races are better than others at running/sports. This “natural athlete” stereotype is a very real dehumanization tactic that racists use (primarily on black people, granted) to this day, and this scene now really reads like Steven’s applying those ideas onto Sandman. That’d be very period accurate for a rich white guy in the 1890s, I guess, but once again—the scene didn’t originally read like that!

I get that they wanted to make the first part of the race one long episode, and some things had to get cut in the process. But surely there was a better one line alternative than “this is the natives’ unknown power.” Here, I’ll brainstorm one really quick: “it’s his running style; I’ve never seen anything like it.” Maybe that’s still a little too long and clunky, but it still gets the point across without feeling racist.

I DIDN’T THINK I’D GET THIS FAR! I HAVE NO IDEAS FOR A COHERENT PLOT RN I’M AFRAID. THE BEST I COULD DO IS MAKE MORE BULLSHIT LIKE THESE:

Idk when I was younger, you could just go and go and find exciting new websites full of whatever cool things you wanted to explore. An overabundance of ways to occupy your time online.

Now, it's just... Social media. That's it. Social media and news sites. And I'm tired of social media and I'm tired of the news.

You're right that the internet is smaller than it used to be, but there's still some cool stuff left in the corners. I'd recommend checking checking out Neocities if you haven't--it's an independent web hosting platform like Geocities of the old web, and there are hundreds of interesting and active pages discoverable both through their search function and through web buttons (links attached to small pictures with the title of a website) within the websites themselves. Here are three examples of web buttons you may find in link pages:

Most Neocities websites have link pages or button collections with anywhere from tens to hundreds of these. Don't be afraid to explore!

If you're looking for something more like a search engine, I can point you towards Marginalia. It's not a particularly smart engine, but it's perfectly usable if you've ever been taught to use search engines back when they were mostly run through keywords instead of full sentence comprehension. There's also an "about" and "tips" section on the front page with more information. The algorithm of Marginalia can be filtered by the user to allow, disallow, or require JavaScript depending on your needs, plus there are filters designed specifically to prioritize web 1.0 sites or mostly text-based ones. It is possible to search for modern websites with it, but it can return websites from just about any decade (since the invention of the web, obviously) so long as they contain the information you're looking for. For example, here are some random interesting sites I've found using Marginalia:

Native Languages of the Americas: Native American Cultures

BASIC HTML COMPETENCY IS THE NEW PUNK FOLK EXPLOSION!

Earthbound Text Labs by Bill Eager

The possibilities for discovery are truly endless.

Now you might want to know about directories. These make browsing for websites easier, but require you to read through and judge which ones to visit, as there aren't algorithms ranking the sites besides the whim of whoever coded the directory. Some of them have themes, others don't. Here are two that I've used:

Yesterlinks Directory

Ichigo Directory

Directories can be harder to come by just by surfing the net, but they aren't impossible to find. Many personal websites have their own directories of interesting sites hidden within them.

Webrings are similar to directories, but are actually more community-based. You have to register your website to be a part of a webring, usually by sending an email to whoever runs it and meeting some kind of entry criteria. For example, my personal website used to be a part of a webring called Sweet Dreams, which was for websites that heavily utilize color palettes and images of cute things, particularly sweets. Webrings will give you access to a widget upon entry that allow visitors and other members to browse between the registered websites in a massive ring, ergo, where the term gets its name. Webrings can have any theme or criteria for entry. If you can make a website about it, you can find a webring for it.

Now, you might be wondering about social media alternatives. I can't offer much, but I can nudge you towards the idea of forums. Here's one I found that could really use some traffic. I also browse a bit on MelonLand forum, which is actually closed right now--it's currently closed on Mondays--but on any other day of the week, you can find a fun community there dedicated to web revival. You can find it through MelonLand's main page. I'd also recommend checking out SpaceHey, which is a MySpace clone that's customizable and easy to use.