Yea, right, too bad he is dumber than a box of rocks when it comes to how the USA actually works and his "arguments" and 'observations" are void of all logic for this very reason.
The US works pretty poorly in a great many respects, just as does any country. The US is mainly different in that its population likes to have lots of guns and is obsessed with this fear of being robbed of some archaic rights long irrelevant to today's world, and actually more than a little counterproductive to its wellbeing today.
It does have the problem of having to cope with having far too many different races and religions deeply built into its structure, thus losing a common sense of national unity that runs second to its senses of colour and original ethnicity from Europe and elsewhere. Those things aside, it contains the usual mixture of wise men and idiots as does almost anywhere else. In fact it may, in a sense, be ahead of the curve: much of Europe is building up for itself through immigration that very same state of lack of national unity and of conflicting religions and language to be found in America already.
That the fragmentation of legal and political control is so prevalent in your country, with different states free to go the way their governors think may get them re-elected is one reason why you face many of the current problems that you do and why fierce fights develop. Nobody speaks with one voice - they can't.
Frankly, you represent the wost-case scenario of what Europe might become, much the reason for the victory of the Brexiteers who saw too much integration turning a loose alliance of business and social convenience into something closer to the States. As long as Britain kept its own currency, all it had to do was take advantage of the bonuses of membership. In reality, it always controlled its own borders, and well before joining the political entity of the Community it had already lost any idea of how many people were inside there legally or otherwise. Controlling your own borders should never be taken to imply that you can or do do it well.
Understanding how the USA works is not rocket science: internationally, we get deep lessons of it every bloody day on our tv screens. Or at least, we did before lock-down stopped reporters from doing that.