In the words of Pogo: "We have met the enemy and he is us."
London is a particularly dense and crowded city, so it's (unfortunately) expected to be particularly expensive.
Yeah, a few decades ago in the economic boom the United States undeservedly enjoyed after the rest of the world powers were devastated by WW2 and tens of millions of human beings lay dead. The "older generations" outside the US jolly well were not "getting cheap educations, building big houses, buying summer cabins, investment apartments, multiple new cars, having multiple kids", etc.; they had to trudge a long, hard road to rebuild their homes and livelihoods and recover from the scars of war.
This idea that the current generation has some sort of inalienable right to do as well as previous generations is bizarre. Even a moment of thought would tell you that no such thing exists.
I don't assume this applies to those who genuinely "broke a cycle" and that might have been the norm long before the post-modern era.
When the older generations were her age a few decades ago, they were getting cheap educations, building big houses, buying summer cabins, investment apartments, multiple new cars, having multiple kids.
Now for the younger generation, well, this article and the link below it titled "I live in a $62/month dumpster that I built for $5,000" probably tells how great things are.