The platforms always counter your moves. At times I've found that shared links simply don't work, or they divert to a 404 page. It's often hard to figure out what is happening unless you have several different workstations over several different IP addresses.
It would be wild if a YouTuber did some documented video tests on this issue at some point.
I work with Spotify links and the Spotify API regularly for work and have never seen a link to a playlist or track randomly 404 or not work. Spotify share links are really basic, they're just an ID and type of link, like "/track/{id}" or "/playlist/{id}".
Not saying you're wrong, I've just personally never had issues with them, and I work with lots of share links from a variety of artists.
I think that you are a bit too hung up about what happens where on the internet, especially considering that your complaint is about bad faith actions of the large platforms.
