Then I suspect you're deluded. Apart from anything else it's impossible to have empty shops and crack houses every 10ft, because the average frontage for a shop is 12-14 feet, and more for a house.
So, hyperbole.
As for the rest of your post, as I've said previously,
yes, all of that shit happened, but not in the non-stop, intense way you imply, and not all at the same time. As for "no go areas", I'm a white bloke, and never found trouble on any of my nocturnal peregrinations around Brixton. A couple of propositions from sex workers on the corner of Josephine Ave and Water Lane, but scarcely "no go". Even when my own estate was notorious for sex workers fucking clients on our stairwells and banging up, it wasn't a "no go area", unless your sensibilities were so delicate that the sight of human misery roused nausea in you, rather than compassion.