There’s an article with interesting pictures here: https://mcmansionhell.com/post/154653904191/a-pictorial-history-of-suburbia

But more than that: every country has ugly places like this. You just rarely see pictures of it. And I bet, in terms of squalor, the pic on this post is much better than some US places.

Also, the term “left-wing architecture” is completely nonsensical.