This is a somewhat silly question because you could probably get anecdotal replies of all kinds to it. Some things are different to how they used to be, and in some cases different in ways that feel bad. For example, there are more empty shops in the town centre where I live compared to 20 years ago, which for some people evokes a strong emotional reaction and a sense of loss.
When you say "like Detroit" I assume, having never been, that you mean a high crime rate and unemployment rate? You could visit the ONS: https://www.ons.gov.uk/peoplepopulationandcommunity/crimeand... https://www.ons.gov.uk/employmentandlabourmarket/peoplenotin...
My own personal experience tends to back up what the data here show (no significant changes really) - I teach in a large secondary school and really, kids today are not massively different from how they've ever been. They face challenges in navigating the vast amounts of information and misinformation presented nowadays, but we do try to educate them as best as possible in respect of this.
Cheers and hope this helps.