>> Sometimes a monopoly is a monopoly because they are better than everyone else.

There is also the case of "natural monopolies" in economics, these are railways, postal services, etc. where it wouldn't make sense for multiple players to waste resources and the one player can benefit from economies of scale. It'd be hilarious if 2-3 rail companies tried setting up their own tracks, stations, signals, etc. in a small town for example. So much redundancy all going waste.

Another example is multiple telecom companies trying to erect their own towers in vicinity of a little town where only one is enough to provide coverage. It's a collosal waste for the whole society, not just those companies.