I’m English (maybe one tenth Welsh!) I’m not finding this thread offensive, I’m finding it quite funny! Some of the stereotypes do make me chuckle, like how much tea we drink (I’ve had three cups today), everyone thinking we have High Tea everyday (I wish), the queuing, talking about the weather, queuing to complain about the foreigners who can’t queue.....
Some of them I’m finding quite baffling! The dirty house one (I’m feeling quite offended 
) - never heard that before!
I spent two years in America in total (two summers for a summer camp and about 18months after graduating) and a term of my uni degree in Germany. I realised some stereotypes are not far off the button, some I can’t explain and learnt about the stereotypes of these two countries as well!
The Americans in general loved my accent! Always thought I was so posh (I’m really not). Many definitely thought I had High Tea every day and several would ask about the Royal Family and had I met the queen. British people (from those I met) were perceived to be well off, posh, went to Oxbridge and drank a lot at the pub on a daily basis.
I was there when Obama was doing the healthcare reforms and this is where my life got interesting. I was in a liberal state so they were largely pro the changes but worked on possible tax hikes. In the opinion of many, at least half my income in England went “straight back to the government”, and while many wanted healthcare reforms they didn’t want to pay much tax at all. My opinion of the NHS was asked a lot. It was presented on American TV as the face of all evil, run by the devil himself and controlled by government, in that the Prime Minister would receive a list of all treatments needed and make his choice of who got it. All NHS hospital ward photos were basically from war times when the beds were a foot apart and 100 people shared a ward. An interesting interpretation. Several people were shocked that I am in fact a cancer survivor (how could that NHS have saved my life?!) and they all asked about my teeth! I told them the truth - don’t judge the whole system on one persons experience. There is good and bad within the NHS but the fundamental is that everyone can access healthcare. And I remember saying the American Healthcare is amazing - if you can afford it.
Now obviously I’m older and more experienced with life I still get very defensive of the NHS (so I probably meet a stereotype there) but recognise the faults and know it’s far from perfect and would be supportive of a more European style insurance system where we can all still have access. I’m very Anti - American healthcare system - not the actual care, the system.
I also find the “not well travelled” comment of the British quite interesting - considering how many Brits go abroad for Gap years, the amount of people who are upset at missing their foreign holiday this year, the cheap flights to Europe, schools doing lots of overseas residential trips....I’m just rather surprised that’s how many see us! I would apply that to how I see Americans (and from my time there that hasn’t really changed!)
The sexual comments - omg! I haven’t had that said to me but agree as a nation we are prudes - I refer to something as simple as communal changing! On holidays overseas, you can tell who the British are! European women on beaches just stripping off to change, the Brits are wriggling under their towels! Communal changing areas - I remember at a famous Lagoon, women were stripping off and strolling round the changing rooms naked and showering in front of all - British women were queuing for the cubicals (myself included). British spas always have the showers private, Europeans ones are always free and open! We are prudes
Likewise in Germany (I was in a school) I remember teachers just dropping their trousers and changing for PE in front of everyone in the staff room - bet ya bottom dollar that would not happen here!
The Germans I met found it funny how hard we try to speak languages but how terrible we are - we don’t learn useful vocabulary at school! Learning how to describe what’s in your pencil case for your oral exam gets us nowhere! They also said we are always late for everything - Probably true, everything in Germany ran to timetable. Train at 1pm? That’s when it’s pulling out of the station, not when it arrives. Everything was bang on in Germany. But they found it hilarious when I said about all of them owning some Lederhosen and eating schnitzel and pretzels everyday.
Anyway, one thing I have learnt over the years is that we all laugh at every countries leadership but most people understand that not all British voted for the current power or Brexit.