Dons led 2-0 after 13 minutes thanks to Alex Gilbey and Joe Mason goals, but Dan Barlaser and a Freddie Ladapo brace saw the Millers leave Stadium MK with all three points. Here's how the Dons rated on a disappointing afternoon.
5. Regan Poole - 6.5
A strong return to the side. Had he made it 3-0 early in the second half, it would have put the game to bed. | jpimedia
6. Jordan Houghton - 5.5
Nearly cost his side an early goal when needlessly giving the ball away. Played out well, but looked nervous when Rotherham began to put pressure on. | jpimedia
7. Conor McGrandles - 7
After his error cost them last week, McGrandles showed why he is a key man in Dons' midfield. But like the rest, struggled to alleviate the pressure in the second period. | jpimedia
8. Callum Brittain - 7
Looks a player renewed in the midfield, but was powerless as the rest of his team-mates capitulated. | jpimedia