The Clarets headed to Hertfordshire on the back of a seven-game unbeaten run in the league - with four wins and three draws. However, City were left rueing missed chances as they returned home without any points and with their unbeaten run ended.
Stringer was left frustrated, telling his club`s official Pitchero website: "I'm totally frustrated.
"I'm more frustrated with the fact that they had two shots and two goals. To be honest, it gives you a mountain to climb. We've had opportunities to score.
"I don't think we played great, we didn't hold the ball up in the first half as much as we should have done. We got the ball into dangerous areas a few times, but we didn't really compliment holding it up or getting a shot away. It's been difficult.
"The boys pressed up right at the end, but we were a little bit too late. Of course, I'm disappointed as it's another three points dropped, but this is a season we seem to be having. Very up and down.
"Twice they got down their left and twice they had a shot on target and both times they scored. I don't think you can blame the system, I still think people need to engage at the right time and people need to put their bodies on the line.
"We could have defended it, it was not as if we were being cut open. It was just people needed to do more in those situations.
"We've come out in the second half and had a right go but unfortunately, to be fair, St Albans worked hard again. They have beaten us twice this year and maybe the energy levels they've got, the youngster they have are keen to run around, and they defended from the front.”
Stringer also paid tribute to the supporters who made the trip to Clarence Park and was disappointed that his side could not offer more than they did.
"I'm disappointed for the supporters," he said. "They have come here in numbers and we've just done OK. It's not good enough for me and things need to change, we need to get better very soon."
The Clarets travelled to Clarence Park with Max Porter and Matthew Johnson, however neither featured in the City squad due to injuries, Stringer revealed: "Max is injured, Matt Johnson has a little niggle. At this time of year if you don't nurse them then you end up finding out you're going to get worse and we cannot afford to take those risks.
"Tom Hitchcock is outside the squad too so there are a few to come back in and on Saturday's performance maybe they'll get their chance sooner rather than later."
Tomorrow Chelmsford travel to Colchester United as they look to progress to the semi-final stage of the BBC Essex Senior Cup. However, Stringer admitted he will be rotating the squad at the Weston Homes Community Stadium.
"We will move it about, definitely. I think we need to, that's what we need to do. So, we'll get ourselves over Saturday's disappointment and then get ourselves ready for Tuesday".