Kilmarnock boss Allan Johnston lamented his side's poor defending as they lost a cracker 3-2 to Dundee United.
Alexei Eremenko cancelled out Gary Mackay-Steven's early opener, then Kilmarnock led when Rory McKenzie got the final touch to a Kris Boyd lob.
However, Curtis Good and John Rankin hit back for the home side to leave Johnston and his men frustrated.
"We've put such a good performance in," he said. "Scoring two goals, you've got to get something from the game."
It was the second time this season Kilmarnock have held a second half lead at Tannadice only to end up losing the game, with the hosts repeating the feat they managed in November's Scottish Cup tie.
"It was a really good performance today," Johnston told BBC Scotland. "To come up to Tannadice, score two goals and play in the manner in which we did, it's really frustrating that we never picked up anything.
"Some of their passing today, and the movement from Boyd and Eremenko - and all the other front players today as well - was fantastic. We dominated for a lot of the game, created a lot of chances and that's why it's so frustrating that we didn't defend properly.
"We just can't lose a goal from a set-piece. You're picking someone up and you've got to get tighter, you can't give someone a free header in the box, and that gave them a massive lift.
"To be fair the third goal we should have done better with as well. I think they had a wee bit of luck there. I've not seen it again but seemingly it took a huge deflection, he's on the by-line and it's managed to go into the top corner somehow."
Another plus for Kilmarnock was the returning Eremenko making his first start since re-signing for the Rugby Park men, and the Finnish playmaker showed he hasn't lost any of his touch.
"[He's a] massive player," said Johnston. "You can see the flashes of skill that he has, some of his passing, and we look as though we can control games with him in the midfield."
"The positives to take from the game is the way we played, and we've got to continue that for the remainder of the season.
"We've got to learn quickly that it's results that count."