Some people, perhaps correctly, see them as a centralizing entity for the internet with a profit motive. That they are also currently kind of "eating the world"

Some people, perhaps correctly, see them as a centralizing entity for the internet with a profit motive. That they are also currently kind of "eating the world" gives cause for concern. They currently haven't yet betrayed their users but many see it as a matter of time before they begin selling user data. Happy to be corrected on that last bit by the way if they have done anything egregious.