Hi Catalina,
The horizontal line of the sofa would not have been my choice but if it was just a quick snapshot of his pose it may very well explain it.
It is normal practice to move the subject away from the background and use an aperture that will cause it to be out of focus but the subject sharp.
Here's a very very quick edit on the photo to give you an idea of what is extremely easily achieved. I have done a crop to basically retain the ratio, but there are many possibilities.
Note how the detail has been enhanced in the jumper, it's been sharpened and I have put back some colour but not sure what the true skin tone should be.
Grahame