Look at this official poll. Nino is dead last.
Nino's recent development turned her into a Marika-type (clingy, pushy and cock-thirsty slut) of character that only gets BTFO and still generates most hate anyway, just like Marika. She can't get a break.
And only Eririfags care to hate Utaha nowadays. Megumifags and Utahafags are happy with their respective endings.