If the Spurs make a deep playoff run, that means members of the media might have to spend time in San Antonio again, and they all hate San Antonio.
There are three typical media types. The first is the West Coast guy based in LA. If the Spurs go deep in the playoffs, that probably means the Lakers got knocked off at some point, so he's bitter.
The second type is the East Coast guy. This is the same type who absolutely looooooves spending time in Austin but hates San Antonio. Austin is very 'hipster' and very white, while San Antonio is not 'hipster' at all and is very Mexican. To the East Coast media guy, the only time he wants to see a Mexican is when his house needs cleaning. When those people call San Antonio 'fat' and 'dirty,' they are using code words to alert other East Coast whites, "caution, lots of illegal alien greasy s here." East Coast guy is bitter that both David Robinson and Tim Duncan were drafted into and then chose to stay in a city that not only is in flyover country, but to them isn't even really in America, thus exporting potential American championships to Mexico.
The third type is into hip-hop culture. The only NBA city arguably less hip-hop than San Antonio is Salt Lake City, and whaddya know, it is about equally loathed in media circles. Not only that, but the Spurs' team culture runs diametrically opposed to hip-hop values of individual expression, demonstrative self-aggrandizement, and creative flair. Basically he is bitter that the Spurs' success invalidates his worldview and self-image.
My advice: they all can themselves.