The idea that a woman can't break up a relationship unless she gives a explanation good enough to satisfy her partner is sick and revolting
The partner is not satisfied with her reasons? so what, who cares?
The problem with this case is Nene only said 'I don't love you anymore' and Amane of course was not satisfied, it makes Nene look bad and it's cruel on Amane, but if it's wrong to break up unless your partner is satisfied then by the same logic a girl can't break up with her abusive bf as long as he keeps saying her reasons are not good: 'You want to dump me cause I beat you up? no, I'm not satisfied with that reason, so stick with me forever'
You don't need any reason to break up with someone, just wanting it is enough