Earlier quoted context omitted.
I suspect you greatly underestimate how much the average person didn't really care here. In the moment, yeah, this matters - but Google still beats DDG for certain classes of results and people go where the easiest experience is. I say this as a user of DDG. ;P
People don’t really compare that hard. If DDG’s experience is intuitively easier than Google’s in the first minutes (because there are no ads and results are good enough), people will switch. The real problem is the “embedness” level of Google is much higher than any search engine achieved before: a switcher must make a pretty serious effort to change browser settings, change tools etc, and you can bet top dollars th…
"People don't really compare that hard" has been demonstrated to be false - if people didn't care that much, Bing & co would've seen much greater success in the past few years. It's not like this hasn't been tried before.
Google is so damn good at search that being "good enough" isn't good enough for the average user. You have to be as good as Google. This is why Apple and Mozilla work with Google to offer them as a default - they're not dumb, they know people expect it.