Why I liked or disliked "Of Mice and Men"

At the beginning, I didn't like "Of Mice and Men" because of the language they used in the book, I mean, the language was kind of confusing, they used some bad words and words whose meaning was difficult to know, so I had to read with a dictionary by my side. 

Beside that, I liked the story, I really liked how a friendship can change into a tragical event. That way of showing how society can influence into changing a friendship, made me reflect of how people can change and that also I have changed my optinion or something I had to do because of society and then I regret of that.