What else can he do for EA does he have realistic chance

Yes, well THAT is ‘key.’ Your essays need to covey that passion, AND your teacher recommendations and GC’s Secondary School Report need to reinforce and back-up the way your passion has had a positive impact on your high school and the lives of those student’s who attended your HS. If those element’s are missing, or have been tepidly addressed, your application is not going to soar.