Search has degraded substantially in the past 5 years for reasons wholly, completely, and absolutely unrelated to SEO blogspam.
Google of 5 years ago didn't ignore words in almost every single query I made. Google of 5 years ago didn't constantly give me irrelevant garbage because they keep ignoring the words I use in my query.
This is a wholly separate issue from SEO crap. Ignoring search terms is 100% a Google issue and is 100% Google's fault!
Google search degraded in usefulness before the panda update, when spammers had filled the web with low quality content designed to exploit Google's algorithms. Google improved their search to punish the content farms, and people were happy with that search for many years.
Exactly. In a constantly changing world, you need constantly changing policy to achieve the same outcomes. Even then you probably won't replicate the past universe perfectly.
What you really want is the internet from 5-10 years ago (really even longer than that), and that's not coming back.