Source: Mythology The Two Great Gods of Earth 1st paragraphHera with no idea of justice when she was jealous as she perpetually was; Athena also a war maker, and wielding the lightning's sharp lance quite as irresponsibly as Zeus did; Aphrodite using her power chiefly to ensnare and betray. They were a beautiful, radiant company, to be sure, and their adventures made excellent stories; but when they were not positively harmful, they were capricious and undependable and in general mortals got on best without them.
I know the meanings of each word but I can't understand the blue part as a whole. Would you please
be kind enough to clarify the blue part to me?
One thing that makes me more confused is this word order in the blue part "they were + a".
I mean the usage of "they" with "a" makes no sense to me. "They" is plural "a" is singular.
Thank you so much.