Who could blame his parents for being ticked off? and how long are they going to enable him?
I'm not sure they really are, especially keeping in mind that all we have to go by is this loser's version of the story. Reading between the lines, it sounds more like they are simply keeping a roof over his head out of pity, and trying to rein in his fatass eating habits. Most parents can't really bring themselves to just write off a kid who turns out to be unable to make it in the real world, at least short of the kid getting a felony conviction or a combative attitude with the parents.