Gaslight – attempt to make (someone) believe that he or she is going insane (as by subjecting that person to a series of experiences that have no rational explanation).
Have you been gaslighted at work?
Someone constantly questioning your abilities to do your work, to lead your team, to communicate, to perform the simplest tasks like writing an email… to the point that you start questioning yourself and going insane?
Awesome podcast by Rashim Mogha on spotting whether you are being gaslighted and what to do to about it.