Those "ruined" products handily control huge chunks of the market. So from that perspective, they're not "ruined" at all. They're perfect.
Google search is awful now and there is a very real chance people will stop using it for the first time in like a decade.
Sure, but the one time someone brought actual empirical data into this discussion, it showed that while Google results did get worse, they got less worse than the ones of competing products like DDG (or Bing, which interestingly didn't share results with DDG, indicating that those must have expanded how much they use their own index).
Does that mean Google is better? No, they're still worse off. But if anything they made gains comparatively speaking, and what actually happened is that all search engines got worse because search-engine-spam-avoidance got defeated in huge parts.