Thinking there was some Golden Age when all was well is no use to anyone, and actually harmful, so I hope I'm not doing that. The notion, to exemplify Golder Age thinking, that WE were all ok here til THEY came and spoiled it, and if everybody got back in their box we'd be fine again is a fiction that erases history. I certainly don't think the period of (necessary)post-war austerity is anything to be nostalgic about, although it can be used to prop up versions of "real binmen" nostalgia.
I take all your points, or nearly all, and I'm happy to acknowledge I have far more stuff packed into my house (considerably less than many, I can say) than my parents. But in other respects the world in which they had and brought up a family is imo to be recalled and contrasted with the present. Opportunity and social mobility during a window in the 60's and 70's were far greater on any measure. An Irish immigrant with talent and drive, my dad, could earn enough in a succession of skilled jobs to house and support a growing family on one wage. His children could expect to live longer, could aspire to professional jobs via free Higher Education, keep their teeth and general health longer, set themselves up in homes early in their lives, and enjoy the benefits of improving standards of living. At the same time, they could enjoy the public amenities bequeathed by our more prosperous and public-spirited past, travel the country easily and cheaply by private of public means and feel secure that if things went wrong the state and the health service had their backs. How much of that, for all the superficial increase in material wealth wealth enjoyed in some quarters, still obtains?
Choosing one personal angle. In 2007, I needed and got, without delay, a series of heart procedures, angiograms, angioplasties etc. On one occasion, I came home knowing things hadn't worked. I called the NHS surgeon's secretary. He called me a couple of hours later, questioned me, and said, come in tomorrow. I did and he repeated the procedure, this time with success. These days, I need to campaign to see a GP and declined to call an ambulance when I really should have as I couldn't face the ordeal that would ensue.
I don't think we're doomed, but I fear we're heading in some kind of sub-American direction. Private wealth, public squalor, huge inequalities, insecure and angry people, gated communities, despoiled landscapes, political demagogues. We can do better than this.