Ok, so we can either listen to
(i) people who live in London, or
(ii) people who left London because they were victims of a crime.
I'm genuinely sorry that you were the victim of a crime, but people in group (ii) are obviously likely to have a negative perception of London regardless of how much or how little crime London actually has.
By way of analogy, consider that there are people who experienced a traumatic air accident and who have never flown again. I don't blame them. But their experiences don't countervail the statistics showing that flying is safe.
>> US cities are much worse.
> This also is not the case, and it's amazing how propagandized the UK has to be to think it. If you lot were aware of the true standard of life in most of the US you'd riot.
I've lived in London and DC, and DC (at the time at least, 2007-2011) was uncontroversially much more dangerous than London. And of course it's only 6 months ago that the President of the USA declared a public safety emergency in DC ;) You're not wrong about the overall standard or living, but you are wrong about crime and safety.