I have been thinking about this a lot lately. I think that individual people are subject to a significant amount of human frailty and it has always been so.
On MN and many similar Internet forums, quite rightly you see people to put good boundaries in place and expect a high standard for partners and other relationships. However human beings can behave like shits for a significant portion of their days and lives. Many, many humans have even less of the agreeableness personality trait that could possibly be tolerated by internet keyboards. Are we in danger of pushing things where it is impossible to hold down relationships because the standards we hope to achieve are just unobtainable in average human beings.
I see a lot of assumptions of how behaviour should be that is simply not borne out in human interactions and so I wonder if expectations are being pushed too high.