Actually demonizing Arabs is frowned upon as not being PC. It doesn't surprise me that some people are trying to make it look like it's common, but overall there seems to be a consistant effort to prevent Muslims from becoming villains the same way Nazis are or Russians were during 1980s action movies.
Other than that, the perfect "can beat anyone, can do anything" hero doesn't seem to be around much anymore. That kind of thing died out during the 80s as well for the most part, and it's kind of sad because I miss the stereotype. It seems nearly everyone in movies nowadays is painfully human and flawed.
As far as the bad guys winning, I confess to being a romantic and wanting to see the good guys win. It's all about the journey there. This goes for Horror movies too, and honestly in Horror movies the bad guy wins as often as the good guys.
Anime is also infamous for having enemies win just like that, and honestly you'd be surprised at how badly the heroes get pwned in the last couple of episodes in some series.