This is a complicated question, Ismaila. At present, there are countries that are heavily populated by Muslims, but no real example of a Shariah-based country. Saudi Arabia is probably relatively close, but it too is riddled with corruption and greed. The very formation of a "kingdom" goes against the Shariah. Human rights, especially of women, are often poor as well...again, due to lack of education and corruption.
There is good and bad just like everywhere else, and every other society. You hear bad "stuff" because unfortunately, there are bad people doing bad things, and the media loves to report it. It would be nice if the extremists in the world would let everyone else live in peace...