Has anyone noticed that, starting after TNG, that human society or Starfleet is progressively worse with each new series or movie?
Don't get me wrong, earth is still a paradise by our and Trek's standards.
DS9-humans easily get insulted by words, uses slurs themselves, attempted coups, uses biological weapons, has secret shadow organizations etc.
Voyager-the Maqui are shown as being hateful, violent and distrustful towards the Federation even though many of them are human/Federation members.
They hate Cardassians, though humans have evolved out of judging an entire species for the acts of some.
This is all a function of the simple fact that the Federation is not, and has never been, a utopia. It's always been a culture whose political institutions had progressed, but the idea that Trekian Humans were just inherently "better" or "more evolved" was always just nonsense. Hell, it was nonsense in the early TNG episodes where it was articulated--TNG Humans were as likely to be prejudiced against alien cultures and ethnocentric in their belief in their culture's superiority as anyone else. (Witness the numerous conclusions they jumped to about Ferengi society after only one encounter with a single ship, or their smug and ethnocentric attitudes towards Klingon rituals.)
Later STAR TREK hasn't depicted the Federation in degenerating ways. It's just making it clear that early TNG was full of shit when its characters tried to pretend their culture was truly superior.
Abram's Trek finally shows dysfunctional kids,
The only dysfunctional kid is Kirk, and Kirk is treated far kindlier by the education and criminal justice systems of United Earth and the Federation than he would be today.
Militarism? The Starfleet I saw in ST2009 responded to an invading hostile vessel responsible for the destruction of dozens of Starfleet ships and the deaths of hundreds of crews by offering to arrange a conference rather than jumping to violence; the Starfleet I saw in ST2009 offered to save the
Narada as it neared its fate rather than simply leave it to be crushed by the black hole; the Starfleet I saw in ST2009 identified Nero as a rogue terrorist rather than blaming the entire Romulan Star Empire for his actions. If that's militarism -- well, damn, I'd like to see that sort of militarism today, because that's much less militaristic than society is today.
arguing, bickering humans/Vulcans, slurs,
All of which were long-established in TOS.
need for civilian police officers etc.
Who ever claimed there was no more need for civilian police officers?
It's like they're forgetting the Utopian message that 'started it all'.
TOS was never utopian. It was
better than society today, but it was not utopian by any means. Hell, the very second episode, "Where No Man Has Gone Before," establishes widespread Human prejudice against telepaths.