People tend to look back at things in the past with rose tinted specs.
So teenage pregnancy never happened in the 40's (reality it did, but the pregnant teens tended to be shipped off for the duration), child murders didn't happen/paedaphiles where less common - both complete nonsense as they happened but it didn't make the news outside of the local area, or wasn't believed.
Then there are things like "this [insert item name] used to last longer when I was young", which forgets that something like a washing machine was a luxury that might have cost a couple of weeks wages for a well paid person, whilst now you can get them for less than a weeks wage (at minimum wage).
Or that whilst your car may have cost £500 that might have been a couple of months wages and yes you could fix it yourself, but you'd be far more likely to have to do structural repairs to it (as things like anti rust treatments didn't become common), or regular maintenance on the engine, and warranties on them were far shorter.
And yes, car accidents used to be cheaper to repair, but the flip side of that coin was that you were far more likely to die in one, or kill/seriously hurt someone in one because a lot of the same things that push the cost of a modern accident repair up, also work to reduce the number of serious injuries (a metal bumper is lovely and easy to repair with a hammer, but is awful for injury potential at lowish speeds)