The problem is the culture in countries like Afghanistan and Pakistan and many other countries (including many parts of Turkey). It's horrible facts what you just mentioned, the cruelties against women, it doesn't take place in Islam, but it is more an old tradition which some people thinks has links with Islam. But they are wrong.
So I agree very much with what you say, something which doesn't find place in Quran or Sunnah is not from Islam. Problem with some Muslim countries and societies is not Islam as well, it is the individuals (the Muslims), misguided people.