While there may be trends none of the examples you cite are new, the only thing these trends definitively reflect is that society is changing, which is to be expected.

1) Feudal Society was overwhelmingly debt based with serfs in debt for life or even generations, medieval European society did not collapse but rather changed over time in part due to the unstable nature of this system.

2) not sure what "demographic cratering" refers to here, low birth rate? Low birth rate is a well understood economic phenomenon when a society reaches a position of high comfort and well met needs for its population. I would argue this is a good thing.

3) participation in communities of faith has historically fluctuated, such as during the renaissance era. and high participation is not necessarily a good thing, high religious participation among populations also coincided with religious wars where massive scale atrocities or genocide occurred.

4) increased drug use is generally not even a new trend, if anything just a change in what drugs are used. In use United States, Opioids currently are far less prevalent than nicotine was during most of the 1900's, weight loss fad drugs have been recorded as far back as Ancient Greek society. the increase in prescription drug use over the last 100 years has also coincided with a large increase of the average American lifespan.