The first step to solving it would be proving it exists.

Because it doesn't. It's been a phrase used for over 40 years to decry basically any change the author didn't like, from different technology, the rise of the 'me' generation or the declining religiousness of the US.

https://www.psychologytoday.com/us/blog/202504/loneliness-is...

Individuals may be lonely, but that has always been true. There is no evidence this is different than before, growing, or in anyway an 'epidemic.'