love-hate relationship
Describes a relationship characterized by both strong affection and intense dislike or conflict, often simultaneously.
They have a love-hate relationship.
The drama depicts a complicated love-hate relationship.
愛憎 is a more general term for love and hate, while 愛憎関係 specifically refers to a relationship that contains both elements.
Compound of 愛憎 (love and hate) + 関係 (relationship).