A 'problematic' employee is dangerous to an organization. Handling such a person who continually drags the team down is not an easy feat. The worst is when the root of the problem is their attitude and embedded ignorance about the most basic responsibility as a member of a team. The person is like a virus, if not given the proper 'treatment' and 'anti-virus' will spread animosity and hostility amongst other members, and affect the organization as a whole.
Possible 'cures' might be workable, but if all else fails, elimination is the only answer.
Salam Jumaat semua.