I lived in South London a few decades ago, it was the exact same situation.

Lived in central London, close to 100% of the crime was happening from one area. Police refused to go into that area because of "community relations". No crime in areas that didn't abut this location but no desire to fix. Police pretend to police.

Moved to South London, crime more prevalent but, again, certain areas are worse. Police won't go to these areas, "community relations" even worse. Cash machine near housing estate treated like lootbox. Next election comes round, candidate spends most of their time canvassing on estate. Police only go onto the estate to attend events with "community" telling them they are bigots. Crime continues.

Everyone who works this out either leaves or, if they get enough money, move to safe areas of West London. Today's Londoners do not realise everyone has left, it is just a bunch of people who moved there in the last ten years telling everyone how brilliant it is and pretending they have lived there for years before being forced to leave too. Property prices suggest that actual long-term citizens are continuing to leave in large numbers.