I would kind of like to know what is causing it.

My guess is... in the past everyone was raised with strong manners engrained in them from youth. It scares me that maybe, just maybe, the human condition is to be toxic and that to the extent we are not toxic - we were given manners. However, without strong guidance and social conformance of good behavior, people are left to rot.

My guess is that family is the worst place for this because social niceties are relaxed.

I kind of wish someone would make this a real serious issue because honestly I am currently looking for a shack in the woods for my retirement.