I can't possibly image the miserable existence that some must be living in to muster to any kind of outrage over this.
Forget politics for two seconds: at the end of the day, it's his son. I'm sure Joe feels a tremendous amount of guilt for how Hunter's life turned out (score another one for nepotism/cronyism), and certainly feels that Hunter has already given his pound of flesh for being the go-to human punching bag for the last 5 years because of his dad's position.
He probably doesn't pardon him if he wins re-election this year. It is what it is. Besides, what has being a (relatively) selfless civil servant gotten Joe? Stepped aside to give Hilary her shot, beginning our current nightmare. Came back and won, only to become of the most unpopular, hated, mocked Presidents in a recent memory that includes the guy he beat. Got forced out (rightly or wrongly) only to see the GOP take everything.
Let him go live in Delaware for his remaining years and see his remaining son.