All of these complaints about the various superficial reasons for Facebook's decline I think are missing the forest for the trees.

The "grow fast monetize later" model that social media companies use, along with the user being the product, inevitably acts as a template for bait and switch.

All degradation of user experience stems from that. Of course using a social media platform during its "growth phase" is going to be a lot more of a pleasant experience than using that same platform when it's trying to maximize revenue.