Matt Grimes felt Swansea City were guilty of being naïve against QPR as Graham Potter’s men suffered further away-day disappointment.
The Swans have now lost seven league games on the spin away from the Liberty, having been undone by the Hoops’ quick-fire start in West London.
The visitors were 2-0 down inside five minutes, and three goals in arrears before 17 minutes had been played.
They would eventually lose 4-0, suffering their heaviest defeat of the season and the largest since a 5-0 reverse at Manchester City just shy of a year ago.
It brought to an end a run of three-straight wins – all achieved in SA1 – and midfielder Grimes pulled no punches in his assessment of the Swans’ showing.
“They started on the front foot, they pressed us well and I thought we were a little bit naive to be honest,” he said.
“We were off the back of three fantastic performances and three home wins and I think we thought we could come here and it would go our way.
“But obviously they are in a position where they are scrapping for every point and you could tell that.
“Then when you are 3-0 down after barely 15 minutes you have a mountain to climb.
“We are not happy with how we played, no-one can be. We have to try and pick ourselves up from that and try and get back on track against Rotherham.
“They were so aggressive and we seemed caught off-guard and it’s really disappointing. They got after us, they did it well and thoroughly deserved the win.
“We’ve had a good couple of weeks overall, but we have to learn from this quickly.”