Enshittification specifically is when a product/service/platform gets worse from the user’s perspective because the platform vendor can directly profit from user-hostile design; for example, Google intentionally serves up bad results on the first search results page so the user clicks-through to the second page of results, resulting in more advert revenue to Google[1].
…whereas I feel what you’re describing is another Tragedy-of-the-Commons.
[1]: https://jackyan.com/blog/2023/09/google-search-is-worse-by-d...