I don't disagree -- I wrote as much in my own post. The site is okay once I've unsubscribed from virtually everything it throws at you by default and instead subscribed to a heavily curated selection of subreddits that I found over the years.
Even then, though, subreddits that used to be great have often degraded significantly -- in many cases simply by getting too big. Perhaps that's the primary difficulty. Even some "niche" subreddits often now have 100k+ users. The site is just so much bigger and more active than it was when I first started using it that it's very difficult to capture what it used to feel like, even with extensive subreddit curation and filtering.