Andriy Voronin and Fernando Torres struck Liverpool's goals and Benitez said: "We did not win silverware but you talk about 119 goals, the goalkeeper has won the Golden Gloves Award again for the third time in a row.
Benitez will now look to strengthen his squad over the summer.
"Our idea is to finish as high up as possible and to win trophies was a priority, but we know this season has been very difficult for us," he added.
"We are working hard to improve the squad. Throughout the whole season we are watching players and trying to sign the players we need.
"We want to sign the best players as soon as possible and I think we will get investment from the owners, so we can go forward."
Defeat meant Spurs finished in the bottom half, although they still did a lap of honour to parade the Carling Cup they won in February.
"I think we maybe did suffer after the Carling Cup success, maybe we achieved our target too soon," Spurs coach Juande Ramos said.