[chrisdhal]

There is no monopoly, see MegaBus, FlixBus, OurBus, many others, not to mention specific city to city routes. For example, I used to live in the Minneapolis/St. Paul, MN area and there are specific shuttle busses to go to Rochester, MN to go to the Mayo Clinic.

Also, remember the US is huge. The bus usage in a country like Costa Rica (the closest non-US country I have experience with) is very high, but you can go the length of the country in a day. That wouldn't even get you part way across the US, so depending on where you're going it's not even comparable.

[safety1st]

Your thinking is more accurate than the thinking along the lines of "American infrastructure is bad"

But you fail to consider that business and monopoly are about a lot more than whether a competitor exists. Under the law, the main issue is market power. Greyhound absolutely has 90%+ market power along most of the biggest routes which is a concern for antitrust law. There is a good case that this is illegal under US antitrust law - and there should be more competitors.