What aspects of contemporary society does Bradbury criticize in "The Veldt"?
By finding a way for the parents to pay for the chance to avoid all the difficult things about being parents, Bradbury is criticizing some of the same elements of modern society that he does in many of his stories, namely the drive for increased leisure and a relief from the grind of being human. In this case, as in some other stories, the lust for technology as the savior from the drudgery of taking care of kids and dealing with life as we know it is what eventually leads to the children resenting their parents so much that they basically arrange their murder.
But the children are not immune from the effects of this love of technology as it is also evident that the nursery, taking the place of their imagination, has a very negative effect on them as well. The destruction of what makes us human and elevates us from beasts by something we invented is a common theme in Bradbury's writing.