Les Bleus won just once - a 23-16 final fixture victory over Scotland - and finished bottom having also battled to a 13-13 draw with Ireland.
And Saint-Andre admits his troops are going to need to improve if they are to take anything from their trip to face the All Blacks.
"You have to take defeats on board and I totally assume [responsibility]," said Saint-Andre, who will unveil his squad on Tuesday.
"Even if we weren't far off [a result] in all these matches it was not enough - there is too much missing in too many areas. We must work on our game, our system.
"This difficult period must serve to strengthen us. Three and a half weeks in New Zealand will be interesting to see how the group does.
"We have the fortune to go and visit the world champions and to go to New Zealand is always something exceptional.
"We shall have to show great solidarity at the end of the season to go toe to toe with the creme de la creme.
"The players have the desire to transcend themselves and give everything. We must go there with joy and enthusiasm and huge desire."