Iain Hume's superb 50th-minute strike secured a 1-0 win for fellow strugglers Preston and heaped more pressure on Keane.
He said: "You wouldn't believe how much this is hurting. You can only guess. I am a proud man and I don't like getting beaten. I am still absolutely determined to turn it round. I would like to see it out, but that (my future) is out of my hands.
"Don't ask me questions about things I have no control over. Nine defeats in 11 is not acceptable. The run we are on is not acceptable. I have been in football since I was nine years of age and this is just not good enough. It is poor at any level, in any league, in any country.
"The first half was fine, no problem. But the game is 90 minutes long and once again we didn't seem to be able to score goals. We gave a soft one away and suffered for it. But this isn't just a problem right now, it has been going on for a few months now, even last year.
"We are in a relegation battle at the moment, that's for sure."