Everyone has artists/music that they hate/love. Keeping things in perspective though...it's not like PSY is a One Hit Wonder. He's been a recording star in his native South Korea for a little over a decade. It's not like he needs a hit, or even success in the U.S. to be considered a star - he was already considered one by his core audience (S. Koreans) before this song ever came out.
That said...you gotta admit it's pretty impressive that a Korean Music Artist crosses over onto the Billboard list. I mean from Spanish or other English speaking countries, it's not uncommon at all...but Korean...now that's impressive.