The result dropped the Millers into sixth spot in the table, but Evans is confident that they will bounce back from the heavy loss.
Evans told reporters after the match: "For 25 minutes we were outstanding we caused havoc. For 25 minutes we battered the door and created chance after chance. Then they got a goal from a free kick which gave them a big boost.
"It was the second goal which had a big deflection that killed us. The final scoreline was a bit harsh and we didn't see it coming but we have to take it on the chin.
"We then lacked a bit of character and bit of desire so no excuses. It's a poor performance but we will put it right. We will be back on the training ground. I believe in the players and I believe in the dressing room."
Rotherham have taken 19 points from their 11 matches this season.