Gillingham boss Andy Hessenthaler says the Gills lost their way to concede three second-half goals and lose 3-0 against Rotherham.
The visitors held their own in the first half but goals from Danny Harrison, Lewis Grabban and Gareth Evans after the break sealed the points for the Millers.
Hessenthaler said: "We can't believe it, but we deserved to lose it with our performance in the second half.
"First half we looked comfortable without really creating a lot of chances.
"But goals change games. We should have defended better and we looked a poor side after conceding.
"We are disappointed but I can't be too critical. The way we lost it in the second half is the big thing."