Relative to Mozilla: on the advertising front I can't judge whether Apple is worse or about the same. On most other fronts I don't think there's much of a question. Others disagree, the extent to which Apple's actions are user-hostile is an often debated topic I'm not particularly interested in re-threading.
Google and Microsoft aren't really a comparison, both have been openly anti-user on many fronts for many years.
No, I stand by my statement. I consider Apple extremely user-hostile and in many ways worse than Microsoft and Google. Those ways are just less broadly agreed upon.
Note that "any other major browser vendor" is a short list of ad companies with a much worse track record.