I genuinely don't understand the author's complaint. The only thing I can imagine is that there are a lot more alternatives for self-expression on the internet now, e.g. Instagram, Twitter, podcasts, etc. So blogs are perhaps a smaller percentage.
But given that you could never read even 0.1% of all the blog posts ever written, the percentage is irrelevant. There are more unique, quirky, individualist blogs out there than the author could ever get to the end of.
So I don't understand what the problem is. It's not even factual. The author claims Blogger was shut down... but it still exists. The author claims there's no way to find blogs... but it's pretty easy. The author claims nobody is writing blogs... but obviously they are.
I guess the main complaint is that you can't find quirky random blogs by searching Google for the search term "blog"? Not much of a complaint to me. If you want a curated list of quirky blogs, there are lots of lists out there of people's favorites.