QPR manager Ian Holloway admitted his decision to make five changes against Preston backfired.
North End came from behind to win 2-1 at Loftus Road after Matt Smith had put Rangers ahead.
Holloway included keeper Matt Ingram as well as youngster Ebere Eze while resting Luke Freeman and Josh Scowen.
He said: “I’m bitterly disappointed. I probably made too many changes, but I put people in to try and express themselves again.
“We couldn’t get them on the ball. But we’re here to try to move forward.
“We didn’t pass the ball well enough. Did anybody do what I really expected? No. That today was very disappointing.
“When we change too much, it’s a big ask. I tried to pick a team that would cause Preston problems but unfortunately we didn’t understand where the space was and didn’t create what we should have done.
“We went 1-0 up against the run of play and then some of the passing was not what I want. Whoever I put out there it didn’t work in the end.
“I did think Matt Ingram did well. He’s waited for his chance and I’m going to give him that chance.
“But we didn’t play well enough. Well done to Preston. It’s about learning.”