They broke search by prioritising ads, then trusting the wrong, big publishers (eg every listacle from a big media network), broke their advanced search controls (domain blacklists, quotes that mean quotes, plus-and-minuses to alter things).
Then they added their own LLM's analysis to searches, admitting that that their SERPs are dead. They were in this death-spiral well before LLMs became an alternative. I won't pretend that SEO wasn't making traditional search untenable, but the vector Google chose will make their key product obsolete.
The thing I worry about is what they'll do to retain revenue. They have knowledge systems that cater to a lot more than what we normally search on. They have address data, know where people physically are right now, have live communication data on billions of users, know their shopping habits, and a thousand etceteras. Meta too. They have communication data on billions of people. How are these older software companies going to monetise the data they've amassed in an age when they are getting close to being able to replicate personas, model actual human behaviours?