Google's main problem is that for its search engine to work it needs an OPEN internet. But nowadays big chunks of contetnt are behind walled gardens like e.g. Youtube, Facebook, Instagram, TikTok and paywalls where most are not really friendly to indexing bots. Some people call these data silos.The valuable content is there and vidisble to human beings, but not Google's spider bots. At best these silos are having a nice, littie showcase for the bot but that's it.
Since the importance of data silos has risen a lot, Google is now missing a lot of valuable content for its index, because it simply does not see it.
This is why "Ask reddit" became such a thing, because nowadays for many questions people want an answer to Reddit is the first go to get a meaningful answer instead of Google. At Reddit the crowd intelligence is at work, and of course the people there got better access to these silos than Google has.
This is also why Google now prioritises Reddits so much, in order to improve their importance again.
The newest entry to that game though are LLMs. Putting ChatGPT on Bing was really a blow to Google, because it improved a lot of things for many. It is also the reason why Google was trying to implement something similar so quickly, in order to appease their investors. Doesn't matter that the results are shitty, it only matters something is in place upon which Google can now build upon.