Nice try. DuckDuckGo literally sold itself and became successful based off the promise of behaving more like a library than a journalist. The only thing you've pointed out so far is the obvious - they don't have a legal obligation to fulfill the premises they were built on. Great, as long as the free market is aware.
DDG is a private company, therefore their acts are covered by private law that doesn't regulate censorship.
I stated that before on my previous comment. I recommend you to improve your text comprehension skills, they're lacking.