I feel like Covid and/or social media have really accelerated this feeling of alienation, though at the same time it's always been an issue since we started living in communities bigger than about 10 huts, I reckon (industrialisation, the separation of people from the actual results of their labour, the breakdown of 'traditional' communities, etc, etc).
Speaking as a true introvert, people are still mostly decent if you actually get to know them, but it's also true we're really good at inventing things that actually make it harder for us to all get along, and we've not really evolved to deal with the life most of us find ourselves living.
But as much as I might moan about many things about the world these days - never mind vaping – remember when you couldn't go into any pub or bar without breathing in smoke and stinking of it when you got home? At least some things have got better.