Besides that, it is still a private Company that has to find ways to fund itself, so might have an intent to not always prefer the less-profitable option that would be better for the user.
I use their search engine, but would not consider the browser as there exist less commercial and less restricted alternatives (mainly FF and its derivatives)
There at least was this thing in the past that lets me question their good intent (and/or competence): https://www.derstandard.de/story/2000118461444/privacy-browser-von-duckduckgo-plaudert-besuchte-webseiten-aus
(only in German)
Besides that, it is still a private Company that has to find ways to fund itself, so might have an intent to not always prefer the less-profitable option that would be better for the user.
I use their search engine, but would not consider the browser as there exist less commercial and less restricted alternatives (mainly FF and its derivatives)
still much better then being a public company