@KizioKun janica's kindness ruined the competition. Ed wants to aim for the top for survival and he view janica, the top student, as his goal to surpass, even going do or die with the hero-professor. Janica's backing off cuz she wants to/kindness/affection can be viewed also as pity to Ed, rendering all the hardwork Ed work on go down in value. Knowing that janica can be 2nd even not restraining her written is a major blow for janica. For Ed, well he just accept it for the sake of survival
a girl? maybe >_<