I'm not sure what's with writing in English? Is it because of inferiority complex?

It's the upbringing of the society, which has damaged our identity as a Pakistani. Plus our educational systems is based on English medium for majority and urdu medium for restricted people. That's why people can't speak proper English or Urdu. They offer a mixed trait rather.
I think, community moderators can encourage people to write in native language.They are the authority here, so it's for them to bring, present, and implement new rules and ideas.

Hmmm, interesting. But who determines the quality of a post? Is it me, you, the steemit team, or anyone else?

Lol, steemit needs to manifest new software or robot to check the quality of the article.