This is Ender he is different than everyone else because he was bred to be humanities hope of survival from the aliens known as Buggers. He is much smarter than everyone else and being so smart has made himself enemies.
Ender is different than everyone else because he has a monitor is his neck and is bullied for it
Look its Ender, lets bully him
Enders brother even resented him because Peter was not as smart as Ender.
Ender is taken into space to train with the International fleet and protect the human race.There Ender learns he cannot rely on others for help only himself.
In space Ender is still constantly bullied but like in any high school he learns how to stand up for himself and makes a name for himself among the other children.
Eventually as Ender rises in the ranks he is respected by his peers and mentors as he saves the world from the aliens and gets what hes always wanted, to be wanted and matter to others.