No, $100K isn't a tremendous sum of money to raise a kid. But it's a hell of a lot more than 99% of other people struggling to raise thier younger siblings are getting. And Clemson's not really treating him that badly. If it weren't for Clemson, he'd have never had the $100K raised for him (I assume much of that money came from Clemson fans). They're still offering him a scholarship as a grad assistant. And the $100K is more than enough to cover room and board for him and his brother.
Honestly, after hearing the full story, I think Clemson is doing the right thing. He's gotten a full scholarship, including room and board, throughout his college years. And they're offering him another scholarship for graduate school.