@Louis-Paul Desvignes, it's cropped more than 2-3 pixels from the chin and the aspect ratio isn't maintained as his face is somewhat streched, especially when comparted to the pending source.

This thread contains guidelines for what we're looking for in our cuts in terms of dimensions, snow, collars, face orientation etc. and video tutorials for each element.

If you want to give it another go yourself, I would recommend using remove.bg, which is a free online tool which removes the background to an excellent standard, for free and almost instantly.

Here's a couple of videos on how to use it, one when combined with Photoshop and another using photopea.com, which is a free online app so close to Photoshop that it has the same shortcuts, layout and icons.

If you don't have Photoshop, photopea.com is the tool I would recommend to use to tweak the draft cut produced by remove.bg. It's more powerful and versatile than GIMP and other similar tools.

@Louis-Paul Desvignes It's still a bit on the blurry side if you compare:

I made a video showing all the cutting steps at once, that might be easier