Due to the way the plot of Reorg shook out, we never actually got to show the PPC as it was before everything went to pot. I think the only "routine DIS behaviour" we see is a couple of glossed-over patrols, and Nyx's arrest of Palaver (which is also part of her 'hazing'). Everything else is outside the norm even for them, so you just have to take our word that even when not murdering Accountants in Escher rooms while singing children's songs, the DIS are bad sorts.
Similarly, I've always described it as the end of a deliberately-quotemarked "Golden Age", but what we see in Reorg isn't at all golden. But that's because Nyx and Tango are in really weird outlier situations - they are not experiencing the PPC's normal running mode!
Alex and Sam, and Kell, let me do that. Granted things are already into the downward slide - though there's another thing in the works that may pull things back even further - but by and large their situation is just normal. The DIS are intimidating, but (Twp aside) not actively hostile. Their free time is being eaten into, but they still get it. Their world may be on the verge of collapse, but they're not involved - they don't feel it.
Yet.
But yes, the DIS are just a crowd of bullies, with a few people who think of themselves as Good Apples thrown in. We'll see how that pans out.
(KPI is Key Performance Indicator, and is really obnoxious corporate jargon that still exists today. Given that I have to work with these people, I allowed myself one abstruse* Grown-Up Joke.)
hS
(*I have always thought this word was "abtuse", like obtuse. Apparently there's a whole two letters I just completely missed!)