Derek Adams held his hands up and admitted the best team won after Ross County were thrashed 4-0 by a rampant Partick.
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Goals from Stuart Bannigan, Gary Fraser and Stephen O'Donnell, as well as an own-goal from Ben Frempah, secured the three Scottish Premiership points for Thistle at Firhill.
The defeat followed Sunday's loss to St Johnstone and leaves County sitting bottom of the table.
And boss Adams conceded his side simply were not up to scratch compared to their hosts on the night.
He said: "It was a bad night for us, but that's taking nothing away from Partick Thistle. They played very well and deserved to win.
"Maybe we could have scored a couple of goals ourselves after hitting the bar and Scott Fox making a couple of good saves.
"But the best team won. Partick passed the ball well, they were fresh after not playing on Saturday and the goals they scored were well-worked goals.
"They looked accomplished and strong and they will be delighted they have won. But we are obviously disappointed that they have beaten us."
Partick were forced to wait until February - and a 3-1 win over Aberdeen - to pick up their first league win at home last season.
But there were no such problems in front of the Firhill crowd on this occasion and boss Alan Archibald hailed the display from his players as "perfect."
He said: "It's a great start and I'm delighted to get a winning start.
"I was a bit worried Ross County might nick a goal so I was pleased we got the clean sheet as well.
"I think we had a few performances like that last year - we just didn't score the goals.
"The difference this time was that we put the ball in the box, we made the other team defend and we got the goals from that.
"You've got to get the goals and we got that and it competed the perfect performance for ourselves."
The scoreline could have been even more emphatic had referee Andrew Dallas pointed to the spot, instead of brandishing a yellow card for diving, when Kallum Higginbotham went to ground under pressure from goalkeeper Antonio Reguero when the match was still goalless.
But Archibald had no complaints about the match official's decision, adding: "It was maybe a dive.
"I've not spoken to him about it but I think he probably tried to make too much of it."