If you say "Reddit is essentially falling apart for many users" then you do miss the point of subreddits.

There is no Reddit, there are communities united by the same platform.

In fact, I see this complaint all the time and it is usually coming from people who didn't discover the beauty of subreddits.

Again, there is no Reddit. There is nothing to fall apart.

That's unless you refer to the default front page as Reddit. The front page is falling apart because the default subreddits are being swarmed with teenagers. But the front page is not Reddit, subreddits are Reddit.