The Forward has a good overview of the charges and allegations surrounding both of Israel's Chief Rabbis.
Best and most accurate quote comes from Ha'aretz's Shahar Ilan:
Metzger's victory was reported at the time to have been fueled by strong support from the leading figure in the ultra-Orthodox rabbinate, Rabbi Yosef Shalom Elyashiv, who is considered by many Orthodox Jews around the world to be the final authority in rabbinic law.
Elyashiv's followers said they were backing Metzger despite his weaknesses because of his promised loyalty to Elyashiv on rabbinic law matters. Critics, however, grumbled that the ultra-Orthodox sage pushed the weaker candidate in order to discredit the institution of the state rabbinate. "Elyashiv supported the travesty that is Metzger because he wanted to thwart Ariel, but also because he wanted to embarrass the chief rabbinical post into oblivion," said Shahar Ilan, religious-affairs reporter of the daily Ha'aretz.
Judaism's Black Pope strikes again.