I have. By and large, I agree with you, but there are some arguments to be made in favor of allowing monopolies. I find the story of Bell Labs (mentioned in the article) especially striking: a frankly unreasonable number of innovations and ideas were developed there. The creation and continued existence of Bell Labs as a dominant force would likely have been impossible without Ma Bell's monopoly.

Peter Thiel also makes a case for monopolies in Zero to One (do not interpret as an endorsement).

Monopolies are the creation of government, they are facilitated, enabled, done by governments. When you give the government the power and the legitimacy to break up companies the government will do that at its own discretion, to serve the interests of some other company, or some other greater power.

Also, what is a monopoly? Is Google a monopoly? Google provides an invaluable service for free, if monopoly means higher prices (as every textbook economics teach) for the consumer, I think you should think again about Google.

Being large does not imply being a monopoly.

Even in the game Monopoly, the whole point is to show how bad Monopolies are!