I know it’s been getting worse over time, but I could still find what I needed after some digging.
Recently it’s been like 10 minutes of adjusting search terms, still getting completely useless or irrelevant results, and me just giving up afterwards. Other search engines seem just as bad.
You can right click the URL bar for sites that support the OpenSearch XML standard. Which I guess is what they wanted to replace it with. But I don’t really know why they removed the button to a about: config setting. Could at least be a checkbox or something to enable.