That's some of the boldest optimism I think I've seen in awhile. Maybe your blog is more popular than I assume, but still

And check these books "Superbloom: How Technologies of Connection Tear Us Apart" and "No Sense of Place", maybe it would help you to see the overall effects of the internet (and other communication mediums) and forget this simplistic view that a lot of programmers have. The nature of the communication medium doesn't just affect the message, it shapes everything in society. Ignoring that because you had a good experience here and there won't change anything.

At the end of the day there is no real penalty for being a bad actor on the internet. They get unlimited retries on spamming and otherwise causing problems. In many ways this helps Google entrench itself as the search/ad company. No one else has the money or compute resources to continuously update the internet. Furthermore they have told us it's their job to shove unskippable ads in our faces. They'll gladly let the public internet die in the future if they can push out their own version of "SafeInternet by Google/now with more ads!".

I am also part of some very niche communities on the internet, and although they are small they are certainly thriving.