I Agree completely. As a man who has made a good effort to read most of the classics, I've never understood what people see in this book and the movie's are even worse.
Until this book, upper middle class/middle class children were NEVER before portrayed as being crude, nasty, tribal, nor savages. The book isn't just an "adventure story"; it is a look at the psychological devastation that takes place when a group of usually well behaved, well educated, well looked after children are deprived of adult supervision, care, and rules...left completely to their own devices.
And the thing is...deep down, children really ARE savages, capable of horrid, vile, disgusting behavior. It is society that once kept that at bay; especially for the type of Brit kids who went to public ( what they call private boarding schools )school, at the time, and before that, when the book takes place.