Not GP, but to me, admittably a complete non-expert on search, there are so many low-hanging fruits if search result quality was anywhere on Google's radar that it is really difficult not to assume malicious intent.
Some examples:
- why pinterest is flooding the image results with absolute nonesense? How difficult it would be to derank a single domain that manages to screw google's algorithm totally?
- why there is no option for me to blacklist domains from the search result? Are there really some challenges that can't be practically solved in a couple of minutes of thinking?
- Does google seriously claim they can't differentiate between stackoverflow and the content copying rip-off SEO spam sites?