What a joke. An undeafeated away record weighs more heavily than winning at home.
Btw, once Philander debuted in 2011, South Africa were also a strong team at home until Kallis retired.
There is one thing common between all truly great Test teams: they are brutal at home. They might lose a Test or two at home, but they don’t lose a series.
Over the course of a series, their batsmen and bowlers will eventually find a way to outperform the opposition counterparts in conditions that they are more familiar with it.
The 2000s Australia and Clive’s West Indies developed an aura because they were imperious at home.
The great Australian team lost two high profile series away from home (India 2001, Ashes 2005), but it did not hurt their legacy because they were extremely strong at home - they didn’t lose a single home series until the likes of McGrath, Warne and Gilchrist retired.
Smith’s South Africa failed to built an aura of a juggernaut team because they were not imperious at home.
In addition to losing twice to Australia, they lost to Vaughan’s England in 2004-05 and drew with them in 2009-10.
They also drew with India and Australia in 2010-11 and 2011-12 respectively.
Even a pretty average West Indies and Sri Lankan sides won Tests in South Africa in 2007 and 2011 respectively.
South Africa played very well in India, Australia and England, but you cannot be considered a truly great team with such a patchy home record.
They also got flogged in Sri Lanka really bad. Of course, it had to be our losers (“Pakistan me talent bohat hai”

) in 2007 to give Smith’s South Africa their only series win in Asia other than a minnow Bangladesh in 2003.
Kohli’s India is one of the greatest home teams of all time. Their dominance at home is frightening and teams are scared of stepping into India. Playing Kohli’s India in India is a nightmare scenario for every team.
Only top sides like England and Australia can hope to return from India with a solitary Test win at some point, while all other teams are virtually guaranteed to get whitewashed in brutal fashion.
Besides, India winning twice in Australia and once with their reserve team is a bigger achievement than anything South Africa managed away from home.
South Africa winning in India in 2008 or 2010 would have been on par with it, but they couldn’t close out either series.
In both series, they surrendered a 1-0 series lead with complete bottle-jobs in the final Tests (batted first both times) to showcase the fact that they did not possess the mentality and the ruthlessness of a truly great team.