Ton were beaten 1-0 by the Sons thanks to a Lewis Vaughan goal in the second half but Lindsay says the Greenock men expected to come away with at least a point after giving so much and creating so many chances.
He told the Tele: “We’re gutted. We didn’t start the game well and then they scored the goal and it took us until they scored to kind of dominate.
“We’ve hit the post a few times, had a few good chances but at the end of the day they’ve nicked one on the counter and scored. We’ve not took any of our chances so if you look at it that way it’s definitely disappointing.
“We actually created a lot more chances on Saturday than we have been creating in the last, I’d say, few weeks. We didn’t take any unfortunately.
“Shanks [Lawrence Shankland] has hit the underside of the bar and it’s just came back to Luke [Donnelly] but didn’t sit. Andy [Murdoch] has then hit the post.
“Obviously after Wednesday’s good performance we wanted to go and win, or at least get a point, because it is a hard place to come. We’re not making any excuses though, we should be coming to Dumbarton and leaving with at the very least a point.”
Lawrence Shankland netted what everyone inside the ground thought to be the equaliser before referee John Beaton whistled for an infringement against the on-loan Aberdeen striker.
And Lindsay insists it was a close call that was unfair on his team-mate.
He said: “We’ve had a goal chalked off which I thought was harsh. There’s obviously always going to be contact, so that’s disappointing as well, but it’s just one of those things.”
Lindsay is adamant his side will be back to training this coming week with fire in their belly to improve on the last three results — in which they’ve only managed one point from a possible nine.
And he reckons their game in hand over Falkirk — against St Mirren — will be crucial, with just six fixtures remaining before the play-offs begin.
He added: “It’s definitely good to have a game in hand with Falkirk winning on Saturday.
“Hopefully we’ll get back into training and have a good week.
"With the game next Saturday we can hopefully take it from there and get back on to winning games again.
“There’s only six games left, hopefully we can pick up a few more wins and see what happens.”