Being a jobbing, unknown actor is a hard and thankless task, and things became that little bit worse for Matt Damon when he lost a potential breakthrough role to his arch-nemesis. Obviously, he got the last laugh, since he’s been sitting pretty as one of the most famous and in-demand stars in Hollywood for the last 30 years, while his early-career rival eventually fell from their perch and revealed themselves to be more of a flash in the pan tha…