The coach offered little in the way of excuses for his young side, explaining that the better side came out on top.
"We've been beat, by a team who are better and were better than us on the night so sometimes you've got to take it on the chin a little bit," said Colin.
"There were lots of things that weren't very good and not too much that was any good at all. I think they played better than us, they went about it better.
"In the first half, when we had the wind, we passed the ball really poorly. Although they did apply pressure, we did win the ball and break, then gave the ball away when we were in good positions.
"You can understand giving the ball away when it's tight, but not when we've good possession.
"We didn't pick and choose the right times to go forward and because we gave the ball away in good possession we left ourselves exposed and they got the first goal. For their second goal we had the ball, but it wasn't as blatant that we weren't going to keep it and they've cut right through the middle of us.
"Really, once you lose possession you've got to pick up the right defensive position and we didn't do that quick enough. The two boys up front caused problems all night.
"We had one chance when Fergie almost went round the keeper, if that had gone in it would have made it 1-1. Lee Barnard had a chance that might have bought us back into the game, but I think we got what we deserved.
"Wimbledon were at it and they went about it in a real good manner. Ours will say they tried and gave 100 per cent, and maybe four or five did, but if you let yourselves down when you've got possession of the ball it's hard for the people at the back to continually thwart attacks."
Colin did admit, however, that the youth team players in side might have been a bit jaded after a taxing week.
"I think the boys that play for the Academy have had quite a hard week. They've played at Leeds, travelled back and played a hard game against Reading on Saturday and played tonight.
"It is asking quite a lot and it looks as though they suffered with playing a third game in five days. You can understand and it is something you definitely take into consideration.
"It's a slap in the face for one or two, who'll realise that it's not going to be getting plaudits all the time. They were posed problems that they probably haven't been posed for a while."
Colin will now rally his troops for a tough trek to Coventry next Wednesday.
"I've said to them to take it on the chin. Coventry will be a similar type game, you go to places like them and Derby and they really go at it.
"They might have a more experienced side, Wimbledon were definitely physically stronger than us, but they applied it, did it the right way and deserved to win."
Secure a permanent reminder of THAT night!
Colin Calderwood reflected on a convincing defeat for his reserve side against Wimbledon and said they must 'take it on the chin'.