>>30488958Garchomp isn't uber because its typing sucks offensively. There are far too many mons that resist or are immune to Dragon and Ground, which means that Garchomp can't sweep reliably until the opposing team has been softened up, or during lategame.
There are better sweepers that do Garchomp's job without as many conditions that need to be met. This relegates it to a defensive role (Tankchomp) which it does quite well with good bulk, rocks, rocky helmet + rough skin, and an electric immunity.
That Z-Sandstorm set is dangerous though.