This isn't a 'fallacy' in any sense of the word. There are plenty of people from advantaged backgrounds who do poorly, and plenty from disadvantaged background

This isn't a 'fallacy' in any sense of the word. There are plenty of people from advantaged backgrounds who do poorly, and plenty from disadvantaged backgrounds who do well. The reason for that is degree of effort and life choices. Further, this undercurrent of resentment toward people from advantaged backgrounds is rubbish. There's no cosmic roll of the dice that determines into what circumstances a person is born; rather, that's the direct result of parental choices to have children, knowing full well their own life situation.