Wolves caretaker boss Terry Connor bemoaned the poor defending that has underpinned their season after a 3-2 defeat at Wigan.
Matt Jarvis got the visitors off to a superb start with a brilliant curling effort, but Franco Di Santo's deflected shot cancelled it out soon afterwards.
Emmerson Boyce's thumping header minutes later and his rasping volley after the interval put Wigan in control until Steven Fletcher's late goal.
However, for Connor it was their poor defending that cost Wolves once again as they ended their season with another defeat.
"We got off to a good start and scored a quality goal but we lost the ball for Wigan's first goal and then we were not marking properly from a set-play [for their second]," Connor told Sky Sports.
"Those things have been occurring for most of the season, and it's been our downfall this season and that's why we've not been good enough to stay in the Barclays Premier League this season."
Connor failed to win any of his 13 games in charge and will be officially replaced by the new manager Stale Solbakken on Monday.
Despite his dismal record, Connor insists he has enjoyed the experience and that his knowledge of football has been increased because of his temporary position.
He added: "I've learned loads from it, about myself and about the things that go on at football clubs.
"Like learning to deal with certain things that come your way, but I have managed to enjoy it. Everybody connected to the club has been brilliant to me.
"I've had nothing but good wishes and nothing but support from the football club and it's just disappointing I couldn't repay them with Premier League status."