What's ironic is...the only people I can think of that I've worked with over the years who exhibit the signs called out in this piece were VP level or higher.
Being an asshole or having dark triad traits is often an adaptive and successful behavior in the modern world.
The signs listed of an asshole are pretty easy to spot but try sniffing out the 'hidden', highly-skilled two-faced exec. asshole. They are readily promoted and treat execs. one way and low-level employees another.
It makes sense, in a way. Sociopaths are willing to do things normies aren’t, therefore they have more options, therefore they have more paths to success.