These people hold Dunn to higher standards because of the hustle aspect or the fact he strikesout alot. Now some obviously consider these standards to be bunk and Im in aggreance. However, these are the standards of the traditionalist mindest. I think someone hit the nail on the head when they said "strikeouts are not bad because they hurt your team but because they hurt your feelings." The traditionlist mindest is based on playing the game the right way... whatever that may be. Strikeouts are not tolerated in key situations because it makes you look like a fool to traditionalists, amplify that times twenty when your the all time season leader in that department. Hustle is another aspect. Hustle is to baseball as what simple politness is to social character. People notice when you dont say "thank you" or "please." Same can be said for hustle, I would venture to say most people have seen Dunn taking his sweet time onto the field. It just looks bad. Just like not saying Please makes you look bad in anothers eyes. Now do you need to hustle to be a great ballplayer, hell no. Nor do you need to say please and thank you all the time to be a nice person. But doing each more often, certainly helps. In relation to Dunn, these negatives of his game are more clearly known to everyone. They can be seen instead of quanitified. Thus when Ryan Freel gets picked off first base for the second time in the game, it is forgiven with a "Freel is having a bad day." Now if Dunn made the same mistake, people say, "The bum, maybe if he hustled out to his position he would be more alert."
Not to get all philosophical there, but Im trying to help you understand why people are so apt to criticize such an amazing ballplayer.