Haha, you sweet summer child. "Monopolies are illegal here in the united states"
I have 3 options for internet service provider in my area. All 3 are owned by comcast.
Not only is that a monopoly, it's a government enforced monopoly because it is illegal for someone to make an ISP without government permission.
Additionally, simply because these 2 companies are owned by different entities does not suddenly make the monopolistic business they do disappear. They clearly collude, when one raises rates, the other does too. When one decides to go on a random censorship crusade, the other one does too.
Laws are only as useful as they are willing to be enforced, and the US government is not interested in enforcing its laws against billionaires, only peasants.
Here's another example, a year ago or so, every single US Cellular provider was caught illegally selling user data, estimated to be billions of dollars in profit. The largest fine that was given out was a percent of that. Imagine being allowed to steal 1 billion dollars, and the "penalty" for stealing 1 billion dollars was paying government officials 0.01% of the money you stole. This is how our government works now. This is how laws are enforced.
"Laws are for thee and not for me" is the motto of corporate america.