My mom grew up terrified to play out because of the Moors Murders. When I was a kid there was football violence every week and race riots and more. Yes we let kids roam around back then but it wasn't safer. Society has just shifted it's norms now.
England is massively safer now than in the 1970s, especially on things like roads and workplace danger. Crime is lower than in the 1970s, especially violent crime and homicide. Neither today nor in the 1970s does the evidence support immigrants causing high crime. I'm a 2nd gen immigrant so you can s-off with that bs.
It’s also wealthier overall now, with far more national wealth than back then. That wealth hasn’t been shared evenly, so a lot people still don’t feel richer but even normal families have computers, mobiles, streaming, cars etc. that middle class families had to scrimp for in the 80s and no lower income familes could have. Now they do.
There is still too much food poverty and so please support food charities! But in the 70s many kids were reguarly undernourished. Today it's more about insecurity and so it's vital we feed kids in schools. In some ways the problem has flipped: from kids dying, to kids being fat. I'd rather have them alive and fat though agree we need to tackle that issue next ; )
While we are at it, hundreds of millions, and likely over a billion have risen out of poverty globally since the 70s. Those who remain in poverty don't do so because of global issues but local ones: fragile and conflict-affected states, mostly in Africa. That's the big area of failing. War is still as bad, by some measures worse, as it was in the 70s and 80s. We need to maintain a global role to help generate peace, which is something the West is now failing at. Populations just don't care enough. They do care about climate change, even though the majority of people's live has got better despite it. The areas where climate has a huge negative shock impact are the sames ones where there is still conflict and poverty and we'd do much better for those people by focusing on ending conflict and creating wealth than on climate. *That is not me saying we shouldn't reduce our impact on the climate, just that the priorities of many people are off kilter.
You're just caught up in a pessimism trap. Look objectively and you see that we have made a better England; then you need to move on and do your bit for making it better still.
(All the statements above I fact checked using Google - so you can check me too. Most of the facts came from official GOV stats. No AI was used in the creation of this response ; )