The thing about this pape is, it's part of a sequence of wallpapers poking fun at motivational posters. They've all got the same hurdle, and the text normally reads "If you believe you will succeed". The wallpapers subvert this by inserting increasingly unlikely animals and things that could never clear the hurdle even if they believed in themselves like theres no tomorrow. Included are a head of broccoli (no muscles, no brain, can neither jump nor think) and Diglett (a Pokémon that never leaves the tunnel it burrows for itself, except to peer out of a self-made molehill).
The corgi image now reads "Cunt Destroyer" because even though he has stubby legs, he's about to clear the hurdle. Thus meaning he believed in himself sufficiently to succeed. Thus inferring he has high enough self esteem. Women look for guys with high self esteem and success in life. This corgi is going to be most attractive to them. Thus... CUNT DESTROYER.