That is the world we live in sadly...

Oh, you mean in-game? What do you mean by "constant chaos everywhere" ?

I'm not in your head, I need a precise explanation to understand what you mean.
Is it crashes? Is it fights erupting? is it fire and brimstone falling from the skies?

Any added mods? Did you follow the description instructions?

If you want help, the first thing to do is to describe your issue ;)

I've noticed every city seems to have basically endless fighting and everyone's running around like mad lol.

There will be more fights indeed, but that's just it, not "chaos" and not people "running around like mad" and certainly not "endless" as guards will also be doing a better job ^^

There are already 3500+ people that have played with this collection, if that was default behavior, it would be known. And I don't have this issue either when I play, so...

Have you added mods to the list?
Recently someone else had the same kind of issue with huge parts of the cities being killed during those fights, because he added damage and death chance multipliers...