I certainly do see what you mean there.
I think that lends to our love-hate relationship with the character. I want to ring his neck for about 65% of the film, and the other time is divided among my cracking up at his cliche-ridden dialogue, jumpsuit and what not (ahhh, centralamericaandwhatnot), and you know, feeling some degree of pity.
Case in point:
"You know there's nothing to steal from my mom and Craig."
Start out irritated with him for stealing Anthony's mom's earrings; Move on to laughing about his hollering out the door that Anthony got another ball on the pinball machine, and does he want him to play it; And then that line--aww.
But I can just as easily become annoyed with Anthony because he thinks it's a big g'damned deal (enough of a deal to include the point in his whine) that he picked the earrings out himself. Please. Round of applause for the man stopped jet-skiing long enough to buy a pair of earrings for his mother.
Oh, and I'm sorry, Dignan, but I'm going to skip breakfast and have sex with Inez. Oh, and I'm sorry, Dignan, but I'm going to give your part of the money to Inez. Oh, and I'm sorry, Dignan, but I'm not going to be in your gang, unless Mr. Henry guilts me into it. (Although I wouldn't have been in the gang, but you see what I'm getting at.)
But, thanks, Dignan, for coming to break me out of the hospital.
There's a lot of selfishness in every person in this film. Dignan's is easier to spot. What're you gonna do...they're young.