Hull City were thrashed 6-1 by Eddie Howe's Bournemouth on Saturday.
The Tigers were mauled by a rampant Bournemouth side, who were helped out by a catastrophic performance from Hull's defence.
Hull City's Tom Huddlestone, Curtis Davies and David Marshall look dejected
"It was embarrassing and gutless from us and probably the most upsetting performance I’ve ever been involved in," Davies told hullcitytigers.com.
"I can’t say Bournemouth weren’t a good side, but the result was more down to our laziness and not getting to grips with what they were doing."
Having failed to win any of their previous five Premier League goals, shipping 19 goals in the process, Hull have dropped to 16th place and just a point above the relegation zone.
The Tigers started the season brilliantly with back-to-back victories and have since given Phelan the managers job on a permanent basis, but Hull are beginning to slide uncontrollably down the Premier League table.
Hull City manager Mike Phelan
Their run of games without victory has included games against top sides such as Manchester United, Arsenal, Liverpool and Chelsea, but the game at the Vitality Stadium must have been one that the Hull fans and players envisioned they could get something from.
Instead, they suffered their worst result of the season.
Davies' assessment of the defeat was a fair reflection on his team's performance, and he and his teammates will need to resolve their problems quickly as they prepare to take on Stoke City on Saturday.
Hull City's Curtis Davies in action with Bournemouth's Callum Wilson