Luke Williams said he was gutted about the manner of the defeat United endured on Saturday, as Peterborough United ran out 4-0 victors at Glanford Park.
Connor Washington bagged an impressive hat-trick, with Michael Bostwick the other scorer from the spot.
Williams told The Iron Player HD: “All the lads are gutted and it’s not what we want to have on the pitch.
“They were a good side and they made their chances and took them well; which is the main thing from their point of view.
“It was devastating. To come off the back of a really good win in mid-week and to go and get beat like that and the way we did, it’s just embarrassing really.”
Despite the loss, Williams was awarded the sponsors man of the match, but he thought he could have done more to influence the game.
“I think I could have done a bit better. I felt I needed to get on the ball a bit more, and affect the game more too. It was a bad performance all round and I think the man of the match could have gone to anyone on the pitch, because no-one really stood out.”
The Iron bounced back from two defeats on Tuesday at Bury, and Williams is confident the team can do it again, but stresses the need to find some consistency.
“We’ve bounced back before, but we don’t want to be doing it every other week. We want to go on a good run of games like we did not long ago, and put ourselves in and amongst it.”
United travel to London next week for the second round of the FA Cup, with Leyton Orient the opponents. Williams hopes a win can help the team regain their confidence.
“Maybe we can go to Orient and get a good win, go through to the next round and pick up our confidence again.”