Don't forget the British press and TV, any chance to slag off the yanks is headline news, especially if the wife of Prince Harry is around.
I agree, over the years I've known dozens of Americans, even worked with a few. Never had a problem and I would say 95% of them are incredibly polite and friendly.
America and American ways have always been a source of amusement to us Brits but in a nice way. For example, when I was little I couldn't understand why American cars had a Fender - why have a guitar in a car?
American words? Yes, the complex word 'tap' is much easier if pronounced 'faucet '. Why do you say 'horseback riding'? Is it because without the word 'horseback' Americans have trouble knowing where to sit. It's like 'sidewalk' remove the 'side' bit and Americans wander all over the road.
I could go on especially about your choices of Presidents, but I won't as this just a lighthearted post, no offence intended.
Suffice to say, Americans have given us many fab things over the years and some strange things. But overall, Americans and the USA are good and I have no problem with them, even if they seem weird to us.
Col