The crime rates in other places is irrelevant if the city you've lived in for the last 20 years has become noticeably more dangerous.
This is not "a narrative that keeps being pushed without merit", in fact the people who dismiss such claims are often the ones who live very insulated lives.
There are areas where people do drugs openly, and overdosing, too, and no one cares. A cop walked past a lady overdosing.
You should watch videos of YouTubers going to these areas if you do not want to do it yourself.
The areas are famous for tourists where most phone snatching is rampant, 18 a day at a minimum, on one famous street alone.
FWIW, I am talking about London.
Crime overall is at a low level historically in the England, per the Crime Survey of England and Wales, which track actual victims through surveys.
That's not to say the UK couldn't do much better, but this fearmongering is basically repeating far-right conspiracy claims pushed by the press that are not supported by data including by peoples actual responses when asked if they have actually been a victim as per the Crime Survey.
From The Guardian reporting on Crime Survey numbers for London relative to the rest:
"According the Crime Survey for England and Wales, someone is actually less likely to be a victim of crime in London than they are across the country as a whole. In the capital, 14.9% of people experienced a crime either to their person or their household in the year ending September 2023, compared with 15.7% nationally. But what about different types of crime?"
When we know that police is understaffed and can't respond to all crime, perhaps you should spend less time blindly trusting the numbers. You, too, can't build an argument on unreliable data. Just like the poster you're replying to.