Lamont earned his 72nd cap in the 38-18 loss at Twickenham on Saturday and conceded a rather uncharacteristically soft defensive showing was to blame.
But feeling the early criticism of his side is rather premature, if not unjust, the 32-year-old is expecting a response against Italy in Edinburgh.
Since rejoining in the summer, Lamont has helped the Warriors climb to second place in the RaboDirect Pro12 table with a solitary try against Connacht to his name.
But the form of club teammate Stuart Hogg, in Lamont's eyes, is a particularly encouraging sign for Scotland - one that he hopes will count towards a victory this weekend.
"How can people make predictions or write us off after just one game," Lamont told the Herald Scotland.
"We have three home games coming up. We can still win four games. The Grand Slam is not on the cards but the championship is still on.
"Remember we scored two great tries and Hoggy [Stuart Hogg] was on fire and we showed great enterprise against England. There are things we have to improve on but we know that. Our defence was too soft. That let us down.
"Italy in Rome is a very different animal to Italy on the road in Edinburgh. They feed off the passion of their home crowd and they don't have that away from home.
"As long as we put in big hits, chop the Italians down on the backline or behind, we can win.
"The boys know they had a tough game against England. Emotionally, for myself, I have been doing it a long time but defeat still hurts as much as ever in a Scotland jersey.
"It is not easy losing. It is a horrible feeling. Rugby is not easy when you are not winning."