Its a quite obvious culmination of a number of factors:
1. Women being free to choose whatever lives they want.
2. No real social stigma at being single past X age.
3. Able to have children later/IVF.
4. Society pushing the narrative that men are bad and women are the great (obviously both are rubbish compared to trans people who are the best).
5. Its very easy to amuse yourself as a singleton now in millions of ways.
6. People have much more active social lives despite family/etc so you are no longer an outcast as the singleton/no kids.
7. As a man you can live a fine existence of porn, computer games and GoT re-watches ad-infinitum.
8. Social media sells people a completely unrealistic expectation for life and happiness.
9. People are living at home and relying on parents much longer than ever.
10. People are far less mature than ever and think that maturity is ****-posting on twitter on *insert social justice topic de jour*
Its a mess but no one wants to put their head up and say anything about these things because they will have it cut off for suggesting that modern life isn't all its cracked up to be and perhaps in some ways, old fashioned views weren't as awful as some would like you to think.
Yes much has changed for the better but people aren't happier for it in a lot of cases.
Great post, spot on with lots of these, I personally have never really seen the point of social media, don't see why people need it so much to live these days and spend so many hours on it, like they can't do anything without posting about it and admiring what others are doing all the time, and all the obsessing with these so called perfect people living these amazing lifes that these people end up paying by being so interest in them and funding their perfect life, its all very bizarre to me.