Coach Wayne Pivac was unimpressed after Scarlets let slip a 14-point lead in a 20-20 draw with Edinburgh.
The Welsh region led 17-3 after 30 minutes, but in the end almost lost as Tom Heathcote missed a last-minute penalty from half-way.
That followed Scarlets' decision to run a penalty in their own half with time already up - to Pivac's frustration.
"I was on the bus ready to take points and was very disappointed with the decision," he said.
"In the last few minutes to tap and go with a disorganised group out there I thought was a poor decision, and luckily the penalty was where it was on halfway.
"It was a game where I thought we should have come away with more points and as it turned out in the end I was happy with a man down to get two points to be honest."
It was Scarlets' second draw of the season in the Pro 12, following on from the 32-32 draw with Ulster on the opening weekend.
The west Wales region have so far won just one of their four matches - 43-0 against Treviso.
New Zealander Pivac felt the outcome at Murrafield was particularly disappointing after his team dominated for the opening hour and following Edinburgh's 62-13 drubbing against Ospreys in their previous match.
"Every team so far if they have had a bad performance has bounced back and played well," he added.
"It was two points dropped, I was very disappointed with that performance.
"I thought we'd done enough in the first half and were probably a bit unlucky when Liam Williams lost the ball over the line.
"Those little things hurt us today - not taking the opportunities we made, but certainly the second half was very disappointing."
Scarlets' next game is the Welsh derby against Newport Gwent Dragons on Sunday, 5 October.
And Pivac, who took over as head coach from Simon Easterby in the close season, said his team face a tough week before that encounter.
"[I am] a little bit frustrated but we'll pull this game apart and put it right for next week."