"Online is a facet of the real world and a place for a significant amount of information gathering and discourse so dismissing it entirely is a bad mistake as well."

Having spent time online since the dawn of home internet it would be impossible for me to disagree with this sentiment more strongly. I've been dragged kicking and screaming over the course of the last 3 and a half decades to the sullen conclusion that the internet may well be the single largest mistake our species has ever or will ever make short of someone freaking out and actually triggering a full scale nuclear exchange. All of the negative dynamics you list are demonstrably bleeding into the larger culture, with expected results, and that's before even factoring in naked propaganda, poorly camouflaged advertising, and ubiquitous surveillance.