One theory I have for the degradation of facebook and just internet content/discussion/comments in general in the past 25 years have been the rapid change in the cultural demographic of global internet users.

late 90s to early 2000s, only highly developed economies made up most of the internet but as more emerging markets joined the ranks, they ultimately surpassed those that reached peak internet penetration much earlier.

A lot of these new dominant markets also happen to speak English well enough and in far greater numbers and with it carries the cultural/taste shifts.

Without naming specific countries, few social networks are eclipsed by just a few countries that joined the internet much later than the Western hemisphere (+non-English speaking developed economies).

Cultural norms, values, habits permeate through the internet simply put and the social media platforms are incentivized to reflect it even if the $/country is not aligned but through the sheer power of number and the increasingly unhealthy attachments to what is largely just an ephemeral digital number in a database inside air conditioned facility while the users complain about the heat.

I'll name a specific highly developed country in the western hemisphere: The United States. There's no need to bend over backward trying to blame some perceived degradation in quality of discussion on international adoption of the internet.

According to the Barbara Bush Foundation for Family Literacy [1] 130 million Americans — 54% of adults between the ages of 16 and 74 years old—lack proficiency in literacy, essentially reading below the equivalent of a sixth-grade level.

[1]https://map.barbarabush.org

why don't you just name the countries lol?