What is right (Drarry)

Harry wakes up on the train to the light side winning in the beginning by defeating the 'infamous' Tom Riddle. Now the 'blood traitors, muggle borns and half bloods' rule and those who were part of the defeat of Tom Riddle are called royals. Those with Tom Riddle became outcasted in society and became less than house elves. In this new society, you cannot produce a pure blood child (ex: if the next child will be a pure blood you cannot have a child, you have to keep half blood children or muggle born). Harry realizes how evil the 'light is acting' and realizes how much of a monster he is and now he needs to fix it.