Lennon wanted a reaction from his players after last week's 5-0 thrashing at the hands of Celtic.
But though Johnny Russell's second-half penalty condemned his side to a third straight loss, he took some positives from the game.
He said: "I was disappointed not to take a single point from the game.
"The character was suspect last week and they certainly answered that today.
"We had a lot of possession. The operation went well but the patient died."