They control the distribution channels of a general computing platform at their whim. They push their own services like Apple Music by having pre installed app

They control the distribution channels of a general computing platform at their whim. They push their own services like Apple Music by having pre installed apps, free app store placement, not having to pay the 30% cut over other competitors like Spotify. In a low margin business that is live or die. They force a browser like Firefox to not have its own engine as well. Looks quite anti competitive to me.