The Irish wing-back came off the bench for the final 30 minutes of the thrashing – in what was Wolves' first home loss in 16 matches.
Doherty said: “They kind of nullified us from the start.
"It was pretty much a very professional and clinical performance from them and we're going to have to learn from it."
Doherty insists their Europa League commitments were no excuse for the result.
He added: “I think that would be an easy excuse to use or for people to say, but I don't think so. We're probably a bit ahead of schedule in terms of when we came back in for pre-season, and the games that we've had, but if anything, it's probably just got us right.
“I can't use that [Europe] as an excuse at all."