Confronting the behaviors of a passive-aggressive employee can be as easy as nailing Jello to a wall; count on the likelihood that a passive-aggressive individual will have a plausible explanation to justify any (and all) of his frustrating behaviors.
Do you work in a passive aggressive workplace? This post from Psychology Today identifies 15 common red flags of passive-aggressive behavior in the workplace and offers eight specific reasons why hidden anger is the perfect office crime.
https://www.psychologytoday.com/blog/passive-aggressive-diaries/201704/why-passive-aggressive-behavior-thrives-in-the-workplace