Complex sentence: Incompetent managers will most likely feel intimidated or threatened by this employee, who they consider a disruption to their perceived natural order, and who will almost certainly drive them to set the employee up for failure, or dismiss him.
Split into simpler sentences: Incompetent managers will most likely feel intimidated or threatened by this employee. This employee is a disruption to their perceived natural order and will almost certainly drive them to set this employee up for failure or dismiss him.