For sure some things have deteriorated (and others improved). So it goes. What are some of these things you believe have "quickly deteriorated"? (Genuinely curious)
Your police have basically admitted that if worst comes to worst, they won't be able to uphold the law. 53 criminal zones, for a country like Sweden with relatively little police and military, are beyond managable.
We see the same in Germany, but people choose to ignore it. There are more and more areas in cities where you can't make use of your democratic liberties without being subjected to violence, mostly connected to muslim inhabitants that think their religion is above the law. We have more police and resources to cope with it, but it's reaching its limit.
At the same time I think a lot of people from countries where you really have areas you avoid as a citizen (say, the US) often get the wrong impression when they read about so-called "no go" areas. There's no area on this list that I would avoid going to. And I've been to many, many of them, and have friends/family living in many of them (nearly all violence is between criminals).
Again, not saying it's not a problem. It's a big problem. The police were given more resources in the latest gov't budget to deal with exactly this and will surely get more next year and it'll surely be an important topic in the 2018 election. We'll see how it goes.
What are some other things you think have quickly deteriorated? I'm interested in this outsider perspective.