"analytically bankrupt political thinker" - I didn't think the author implied something so strong.
"but fails to deliver any concrete proof" - Not sure what constitutes "proof" in conversation like this. But I think the author did show that Hume came close to understanding the many problems of his society- racism, divorce, wealth inequality- but his over-skepticism led him to dismiss any social change. The central point is that while Hume was skeptical of change, he wasn't equally skeptical of established order.
I'm not that big fan of this article either. But I think you're being unnecessarily harsh.