system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why is the Wizarding World so utterly backwards?

The level of oppression that exists in the wizarding world, both institutional and cultural, is completely astounding. The lack of resistance to it is worrying. 

The world is quite literally built off the work of slave elves, and retains a system of Human Supremacy and segregation - mixed race peoples are shunned by Human Wizarding society, and even humans of partially non magic origins are extremely discriminated against. 

It's no surprise that a magic fascist like Voldemort can be allowed to exist and thrive in such a society. I also can't believe how accepting Harry, Hermione and Ron are of the ministry when it is so obviously and irreversibly corrupted by bureaucracy. 

The entire wizarding world needs to be smashed by thousands, if not millions, of oppressed peoples, both human and non-human, and built anew, yet resistance is virtually non-existent. What gives?
gpt
The easy power of magic combined with its rarity in the population leads to a small, lazy, narcissistic group.  When you can create and destroy at will you tend to have a high opinion of yourself.  And there isn't much need for progress. New spells and potions aren't created often.  Social change takes a long time.  Everyone is very set in their ways. 

 Society becomes very cloistered as a result.  Everyone knows everyone.  Most people can provide the necessities for themselves, so political power and influence are valued.  That's very easily passed down in families.  Add in the difficulty of building up that power for new arrivals to the community and you get a society that has strict social mixing guidelines.

Plus magic is partially genetic.  Mixing with muggles means your children are less likely to be magical.  That lends itself to bigotry.