K lemme just say that this idea that "classical music is complex for the sake of being complex" is horseshit.
Certainly there was a period immediately after the second World War during which some people (Adorno) strove for music that eliminated ties to traditional elements like conjuct melody etc etc. but even music like what came out of Stockhausen and Boulez isn't complex "just 'cause". The language is merely a means to an end, that end being artistic expression just like what comes out of Tom Waits or Lady Gaga or whatever.