It's as if I said, "This sandwich is okay, but it's a little dry. Not enough mayo for me." And some are hearing, "Not only do I hate this sandwich like I hate Hitler, but I hate every and all sandwiches that aren't made exactly the same way I want." So, folks just come back at me with, "Well, I'm sorry your sandwich isn't soaked in greasy, high fat mayonnaise, Buddy! But of course it's not. A sandwich slathered in that shit would be disgusting, especially if they were all like that." 
I'm simply saying the movie tried to have its cake and eat it, too and that didn't work for me. If it's possible for a movie to have it both ways, I just don't feel this one did that successfully. And besides, I already said I LIKE the movie.
It's not that I refuse to sympathize with these kids, it's that I tried to and ultimately can't, especially when the movie shows me some stuff near the end and goes, "See? Sad, right? Don't you just feel bad for them and like them?" My answer is, "Sorry, but no. It's not enough for me." But as I said before, my bigger issue is that the movie seems to be saying, "It's okay to aspire to be a thug. Look how cute these kids are and yay, they get to be in a gang! That's a good thing!"
And no, I wouldn't want a 30-minute court-room scene where the kids are punished, either. That would be too "After School Special." I'm asking for some kind of balance. I've not seen The Wire, so I don't know if the street kids there are different from the ones here. My view on this applies to this movie, not all movies like this because it's not the same. Not all movies are created equal. Presentation and execution count for a lot.
I can sympathize with an "unlikable" character or an "antagonizing" character or one that isn't squeaky clean (Dr. House and Walter White, for example). It's when the characters don't take any responsibility for the bad choices they make and try to pass themselves off as a victim of circumstance or a product of environment, that they've lost my interest or sympathy. Yes, these things are important and do play a role, but they're not the only thing going on. At some point, it falls to you and your decisions on which path to take, when more than one path becomes available.
For example, I had to stop watching Weeds because once Nancy leaves that expensive neighborhood, the show should be over. There's no good reason for her to continue to produce and sell pot and put herself and her family in danger. After that, I checked out because I knew any sympathy I had for that character was going to go away and I would start to resent her, dislike her and I would no longer get enjoyment out of the show anymore. At least, not enough to keep committing to it.