This is an excellent question which deserves a response. I would argue that there are many things other than Facebook which are leading the race towards a collapse of civilization.

Some may point to being sued for 150 billion for its alleged responsibility in the Myanmar genocide which was viewed by many as a standin case for countless micro variations of similar incidents that rippled throughout the network daily. And scandals like Cambridge Analytica. The thesis being that it has been transformed into a weapon that powerful entities use to manipulate, control, and harass the weak.

This is going to sound like whataboutism, and while I deleted my FB 10 years ago, it is worth noting that there are also legacy factors like CNN & Fox News (>200k dead in Iraq,) the petroleum cartels, proudly neo-nazi friendly X.com, and many more a-holes aside from FB. FB deserves derision, but it is far from the sole reason that civilization is declining.