Yes, Dickens HATED the USA and was quite unimpressed by the people of this nation, even though he was given a gigantic reception here, treated like a great hero, and lauded mightily; all of which he lived for. OTOH...he hated that America didn't have the kind of class system that England had and that people were more open. He was a rather secretive man and only wanted his version of himself to be seen WHEN he decided to show his version of it.
There's more...but the above should explain his complete distaste for the USA a bit.
Just on Dickens’s dislike of the USA...the one feature of life in the US which recurs again and again in the accounts not only of Dickens, but of many other British visitors of the period (Trollope etc), and which seems to have darkened their general perception of the country, was the apparently near-universal habit of tobacco-wad spitting in public.
(And btw your following post about your reluctance to visit the UK...all I can say is that in 95%+ of the country you might be pleasantly surprised. ‘Don’t believe everything you read in the newspapers’...)