Athletics' success in such stark contrast to Giants' demise

I watched the OAKLAND ATHLETICS defeat the MINNESOTA TWINS yesterday, 9-1, to move closer to a playoff berth.
The A's can clinch a postseason trip today, with a victory of a loss by the TEXAS RANGERS.
Alberto Callaspo, Kurt Suzuki and Yoenis Cespedes homered for Oakland, and as I watched, the differences between the A's and my struggling favorite team, the SAN FRANCISCO GIANTS, became clear.
Oakland can pitch, field and especially hit. This season, the disappointing defending World Series champion Giants have never been able to get those three components of the game working in conjunction.
Oakland's progress does make me happy. A great team in a terrible stadium (sewage issues have plagued the club this year) is poised for an extended season.
Oakland's progress also makes it seem San Francisco's World Series victory was very long ago.