Mr. DuLac’s review published on Letterboxd:
I'm tired. I thought I just needed a night's sleep but it's more than that.
I don't think watching someone in this much misery or this badly entrenched in the grieving process is supposed to be entertaining, but damn if Oscar Isaac doesn't make it so.
Leave it to the Coen Brothers to take something that looks like an incredibly depressing idea on paper, a folk singer dealing with grief, and make it one of the most entertaining films of the year. A character study of one Llewyn Davis brilliantly portrayed by Oscar Isaac.
The Coens' script works on multiple levels as you could view the film as representing the grieving process of any sort of relationship. Llewyn's refusal to move on, even when confronted by how easier his life would be if he was willing to change just a bit. Part of it seemed like it's because he would be "selling out", but I think it's much more the fact that he wants to make it on his own now because he can't go through the pain of losing someone like that again.
Oscar Isaac's popularity is probably going to rise a bit in the coming years because of starring roles in a few certain genre films coming up, but it's because of performances like this one that he deserves what's coming to him.