But each emotion is different. None of them have any specific counter-emotion. It's like saying green is the opposite (or adverse to, etc.) of yellow just because they're different colors.People keep focusing on minutia which really makes no difference to the main points.
Okay, instead of saying opposite how about I call it adverse, antagonistic, antipodal, antipodean, antithetical, contradictory, contrapositive, contrary, contrasted, corresponding, counter, crosswise, diametric, diametrically opposed, different, differing, dissimilar, diverse, facing, flip-side, fronting, hostile, inconsistent, independent, inimical, inverse, irreconcilable, obverse, opposed, ornery, paradoxical, polar, retrograde, reverse, separate, unalike, unconnected, unrelated, or unsimilar? (thanks to thesaurus.com)