Except that the huge header covers the settings and only a few are available to me, and I can't see the tabs.
My ideal defaults: Header should be shorter. Contrast should be higher. The O-click box should be hidden and only its tabs should be visible. It should use as much horizontal space as possible (wonder if they plan to add something on the right side). A little bit less spacing between results would be great.
Even though they seem to be nice people, I don't trust them, and I don't believe that the url they are showing is the location where I will go if I click on the link (I don't trust the status bar either), so they should remove that last line from the result and add the icon and the domain (that's ok) to the main title.
I wouldn't be surprised if he hadn't even noticed the hamburger button. On a widescreen monitor the button is way too far from actual content. It really needs to be closer to the content of the page.
On the search page, click the hamburger icon on the top right.
There you can adjust the fonts (to some extent), colors, the position of the header (make it scrolling again), and many more things. All of this is impossible with old DDG, or Google, or Bing, or Yandex, etc.
I wish people that have time to write 3 long paragraphs of complaints actually have tried what they are complaining about. Or, if they have, made it clear that they complain about the defaults.