I don't think it has anything to do with whether you are a millennial or not. If you try and run a workplace based on fear then the only people who stay will be the ones with no choice.
I don't consider a proper dressing down (with some volume for emphasis) to be abusive, sometimes a fog horn is needed to cut thru the fog.
Sometimes there isn't any fog and you're just that guy with the fog horn :)
As someone who /is/ the fog horn, its something I need to be deeply aware of, and try to modulate my volume.