Excellent comment. For "constructive separation", if giving him benefit of the doubt, the relevant employment term seems to be Constructive Dismissal (or discharge or termination). https://en.wikipedia.org/wiki/Constructive_dismissal

"when an employee resigns as a result of the employer creating a hostile work environment. Since the resignation was not truly voluntary, it is, in effect, a termination. For example, when an employer places extraordinary and unreasonable work demands on an employee to obtain their resignation, this can constitute a constructive dismissal."