In 2012, India lost eight Test matches in England and Australia. It also squandered four- match Test home series to England 2-1.
Recently, archrival Pakistan defeated India in three-match one-day series 2-1 at home in early January, resulting in barrage of criticism.
In December, iconic batsman Sachin Tendulkar quit the one-day format of the sport to make way for youngster to prepare for the 2015 World Cup.
Earlier, aging batsmen Rahul Dravid and VVS Laxman, who played more then 100 Test matches, also called it a day.
Ganguly said team was going through a transition phase as many stalwarts had retire.
“Indian team is used to Sachin Tendulkar not playing one-day cricket. Test cricket is different. But in one-day cricket they are used to not playing him. It is going to happen to every team, when lots of your big players go together, then transition stage is bound to happen so we will have to patient with the side,” said Ganguly in eastern Kolkata city.
He said batsman Virender Sehwag and spinner Harbhajan Singh, who have axed from the team due to poor performance, would bounce back.
“I am sure that Sehwag will be back for the Test matches. I think in terms of one-day cricket, they are trying to rebuild the team, trying to build a team, which will take India to 2015 World Cup. New players have been given opportunity for the world cup. There is ample opportunity for Sehwag and Harbhajan to come back,” said he.
Ganguly played more than 100 Test matches from 1996 to 2008 and captained the Indian team from 2000 to 2005.