Keane's side forged ahead through Andros Townsend but some more woeful defending allowed the Swans to pick up victory through a brace from Craig Beattie either side of a scrambled strike from Joe Allen.
Town have now lost eight of their last 10 npower Championship fixtures and not even a place in the last four of the Carling Cup has been enough to shelter Keane from criticism. The former Manchester United captain has seen injury and suspension unsettle his back four but he could offer no excuses for their showing.
He said: "No excuses. We've got to do better. We've got no-one to blame but ourselves, in terms of our defending, the chances we missed and not dealing with the setback of their first goal.
"Their first goal was soft and the second was comical, but then I'm pretty sure I had the same conversation last week (after the defeat at Norwich). It's like Groundhog Day. We're doing the same things over and over again and I'm saying the same things over and over again.
"I probably need to receive criticism and eight defeats in 10 games is unacceptable. I bought players in the summer and I brought players here on loan."