It was revealed yesterday that this picture should have been disqualified at Gubbdata, as it i built upon this original: https://www.wallpaperflare.com/man-fighting-robot-3d-wallpaper-artwork-science-fiction-futuristic-anime-wallpaper-199787

Seems the original artist is Max Revin, and the original is on his ArtStation, under the "Random Art" gallery: https://www.artstation.com/razer

More from him here: http://conceptartworld.com/artists/maxim-revin/

He really is quite an amazing concept artist, gotta say :)