They are competing in the free market. Users are free to not use their software and there are many other choices.
You seem to be objecting to the manner in which they compete.
You seem to be objecting to the manner in which they compete.
Users are not free to use other software on Apple hardware.
The operative question is how we define the market. Is the operative market "all smartphones," or are iOS devices distinct enough to qualify as a market of their own?
The answer isn't clear to me, especially because there are a variety of soft barriers. Even if "all smartphones" is the relevant market, phones are expensive; it takes on the order of $1k to walk away from an iPhone X in favour of an equivalent Android device.
I absolutely am! There is such a thing as unfair competition. As I see it, Apple is using their existing dominance to create barriers to entry for new players.
I'm free to avoid Amazon too, but as increasing amounts of society move to Amazon as the de-facto web store for everything, how reasonable is it to fully boycott them? Sure it's possible, but it would be a substantial life commitment.
The number one phone manufacturer is Samsung, not Apple. Huawei is number two.