What was it that you didn't like about it? I read it a few years ago (can't remember what age I was but I'm twenty now, so maybe I was like fifteen or something) and I really enjoyed it.
Mainly the writting. It was poor, hilariously poor. I seriously think that if I try I might come with a better writting. For example Sanderson - who is brilliant at plots and magic system, but only average at writting and dialogues - would look like a master compared to this. And I fecking hate when the narrator tells you that this story is for another time or will happen later or some equally ridiculous bullshit.
Also, despite having many characters, the author doesn't develop any of them. They are all characters with a name, a minimal story (Bilbo and Thorin, others don't even have it) and nothing else. You don't give a shit for any of them. Thorin died, who the feck cares?! On a book which was written good, that would have been an epic moment. I also didn't liked the plot that much and things happened so fast. Smaug dies on what, 3 seconds of fight?!
I found the movies much better and the changes which were made created a better story. Much more details, characters were more deep, etc etc.
Probably if I had read it when I was 15 (and haven't read before books which are written ridiculously good like Kingkiller and ASOIAF) I would have appreciated it more. But now, its only value is for historical reasons. Otherwise, it is a shit reading for someone who is on his twenties.