petty jealousy

Translations
мелочная ревность
Their relationship was often strained by petty jealousy.
Их отношения часто были напряженными из-за мелочной ревности.
Definitions
Petty jealousy refers to a minor or trivial form of jealousy, often characterized by feelings of resentment or envy over insignificant matters or perceived slights, typically arising in personal relationships or social situations.