I always struggle with the monopoly argument and it might be because I misunderstand it but I see it quite simply:
Any company, let's take Apple (as it's appropriate!) started from nothing, just an idea. Steve Jobs and Steve Wozniak started the company from a garage in Cupertino and managed to grow it into one of the most successful companies ever. Starting a company is easy, creating a successful company is incredibly hard, especially to get to the size and turnover of Apple.
As soon as a company becomes successful, they get slammed and people try to bring them down. It seems to be the same with people who become famous, once they get to a certain stratosphere, people love to try and pull them down and I find that really sad. Why do we live in a world of such hate rather than celebrate successes.
If a company such as Apple is able to be successful without hurting others or selling others (Google, Facebook etc!) then shouldn't that be something to cheer about?
Again, I reiterate, it maybe my lack of understanding but I'm pretty simple!