your cuts are already getting better. See the little thin line of black on the left side, don't be afraid to cut a little deeper into the render. His neck looks a little funky can I see the original.
decent cut here, but these kind of pics are the ones you dont want to cut. the head's chopped off, and so is most of his body. all you can get is the face
also: i 'm not sure if i see the black line you're referring to vikes, but my vision is a little off due to tiredness, i'll have a look in the morning and correct whatever i find.
And the right side of the cut is still a bit choppy at places with a bit of bg. It'd look fine if it was just smoothed out a lil. You have got better though.
Less choppy and better but you can still see its a bit rough. Might wanna go through a bit further inside on that right side and you'll have a solid cut man