O'Neill was still able to take positives despite hearing his players booed from the pitch for the second time in five days, but admitted the responsibility for finding a solution lies with him.
He said: "It's me, I'm the manager, I'm the manager of the football club, absolutely.
"Yes, it's difficult, it's been a difficult week for us, obviously, losing against Middlesbrough and then not scoring here.
"It's been a difficult week, but we will come through.
"We threw just about everything at them to try to get on the scoresheet, but it eluded us today again. But it will turn."