Almost every page needs JS to use. Almost all JS is thoroughly munged beyond readability. It's normal for even page navigation (surely a browser function) to be handled in JS, and for resource loading (again a browser function) to be done through JS making AJAX requests to URLs generated deep in a minified blob. The accessibility nightmare is real.
Ads are common as ever and adblocking is an arms race never won. DRM has been here for years, and HBO isn't putting .mp4s on an FTP server any time soon. YouTube is almost unwatchably saturated with ads and is run by Google, the search and analytics company. Targeted advertising and analytics are a bell that can't be un-rung.
The web you are trying to save became a victim of its own success, somewhere around when everyone decided it was going to be HTTP and HTML instead of gopher, the browser wars started and AOL users started to flood USENET.