Who is the most underrated character?

My pick is Freddy. This is a man who was also likely traumatized by the war, who everyone kind of knew was an alcoholic but was able to skirt by with his good humour and passable work.

It worked until it didn’t, I can’t imagine the pride you’d have to swallow to go back and freelance for the same people who let you go. But ultimately he has more of a redemption arc than most and helps Don out when he’s at his rock bottom.