Crime is often hyper localized. In some areas of some cities, crime may be going up while the overall rate of the city or country is going down. These intensive areas can also change over time. I am not aware of any analysis of the localization of crime and how it changes over time. There are a lot of choices to be made in doing that analysis, but if a reasonable local analysis across a country did that and found that in all localities crime went down, then that would seem reasonable to dismiss that guy's actual experience. The localization should probably on the neighborhood level, maybe on the order of 1000 people instead of 10000 or more.
Which is why I didn’t deny his subjective experience. I only disagreed with him extrapolating his local experience to the whole country. His area might have become rougher, but the UK as a whole is seeing less crime.