There are many things structurally wrong with the political system in the USA - many because things haven't been altered in over 100 years when the country was much more rural; others such as the electoral colleges are no longer required - direct voting with a decent AV system would be more likely to get a candidate that more people liked or a more balanced system of votes in at least the House if not the Senate as well.
But comparing it to other large bodies - which only the EU, India (and arguably China) exist it is the best by a country mile. Which itself is rather depressing.

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