Dwight was right!
One thing I notice whenever I read comments about this movie is how Dwight was "Abusive." In fact, he wasn't. Yes... he had issues of his own that he needed to work out but I interpreted the physical altercations were a direct result of DiCaprio's characters lack of respect for him. Let's face it, Tobias was no angel and MOST of the things that happened to him directly resulted from his own actions.
In my opinion, Dwight was right in trying to help him correct his behavior. I got the impression that Dwight wouldn't have became such a jerk if the kid would have accepted his advice (or at least respected his opinion). Of course, Dwight is the adult and he was wrong to let it turn into a competition between the two, but "abusive"... no. He probably would have been ok if the kid had shown him a little respect.
Yes... Dwight has issues, "Doggie style or on your side.." but that isn't "abusive." Don't be so quick to file Dwight away as an abusive lunatic. Take a look at the people around him.