>Also, freedom of speech is a principle applied on the relation of people with the state, an issue for public law. This is about a private enterprise and its relations with its users, subject to the regulation of private law.

This is absolutely not what the principle of free speech is. Private companies censoring information can be every bit as insidious and damaging to society, and of course falls under the umbrella of free speech. I think you are confusing free speech for the U.S. Constitution. This only applies to American speech, and only a narrow kind of speech. When someone on the internet describes or discusses "free speech," they are typically discussing something far broader.

DDG has the right to provide poor search results. Users here are lamenting that fact.