The Millers went down 3-0, their third consecutive first round FA Cup replay exit by the same scoreline.
But Moore insisted they should have put the game to bed in the first half, as well as slating the players for the second half showing.
"We should have been out of sight first half, you cannot have the chances we had first half and not take anything. We have come out the second half and thought it was going to be easy", said Moore to the press.
"I've given them a bit of praise at half time and said keep doing what you're doing we are creating enough chances sooner or later one of them is going to go in. We started so slow second half and they have a couple of chances in the first four or five minutes, then the first goal is an awful goal, that was the killer and it lifted them.
"Our heads went down which we weren't pleased about. You can't let a lad turn in the box like that and cross a ball, and the third one is exactly the same he's turned and put it in the back of the net. It's the worst I've seen in a long time. Someone's got to take responsibility in there, we got so many blocks in the first half against them", Ronnie fumed.
"It's the worst half since I came back here in the way we defended with individual errors. We have had to change it with Cresswell's back, Ashworth has had a great first half, then the second he is battered, absolutely smashed all over the place with the lad Rankine and as a professional footballer with Rankine you have to stop him playing, we did that first half but the second half to get caught like he did for the penalty he's lucky not to get sent off to be fair."
A frustrated Moore continued about Ryan Cresswell's constant back problems: "It's a back spasm, it's a nightmare, we also lost our keeper before the game, that didn't help but young Jamie has come in and done very well.
"I couldn't fault him for anything, we are not making excuses for the ones that weren't in, the lads that were out there first half had enough of the play but when you're on top as much as we were if you don't put the knife in you get found out.
"It's a worry for Cressie - he trained yesterday but it's stiffened up and in the warm up it's gone again and he can't move his back."